RankingClaude Opus 5

Claude Opus 5

Data updated 12 Sept 2026

65 published benchmark measures · 21 benchmark families contribute across 6 task areas. 5 capability estimates available in the full profile. See all results ↓ · Compare published benchmarks →

Model evidence summary

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A model-wide score would mix effort settings. This page summarizes published evidence; only identified configurations receive leaderboard ranks.

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The capability chart summarizes evidence across reported settings, not a runnable configuration or a leaderboard rank.

Performance profile

Capabilities

Adjusted comparison score · 0–100

Filled points are supported; hollow points are preliminary. Lines stop at unknown capabilities. Exact values and sources follow below.

Agentic6 families · 2 with independent evidence · Supported85.9

6 core families; 52 direct opponents across 19 labs.

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: 82.4–92.9; 0/11 scenarios unsupported. Without one publisher: 80.7–91.9; 0/15 unsupported. Smoothing check: 77.0–90.1; 0/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: family and publisher holdouts improved on neutral predictions within evaluated coverage; source sensitivity still requires inspection. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

OSWorld: 63.7 observed win share
Anthropic, Meta, OpenAI, os-world.github.io · Source 1 Source 2 Source 3 Source 4 Source 5 Source 6
GDPval: 91.7 observed win share
Anthropic, Google, Meta, artificialanalysis.ai · Source 1 Source 2 Source 3 Source 4
AutomationBench: 72.2 observed win share
Anthropic, Meta, OpenAI · Source 1 Source 2 Source 3
OfficeQA: 0.0 observed win share
Anthropic · Source 1 Source 2
DeepSearchQA: 50.0 observed win share
Meta · Source 1
Browsecomp: 66.7 observed win share
OpenAI · Source 1

Hard reasoning5 families · 2 with independent evidence · Supported79.7

5 core families; 58 direct opponents across 12 labs.

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: 74.3–83.4; 0/7 scenarios unsupported. Without one publisher: 64.7–82.0; 0/16 unsupported. Smoothing check: 72.7–82.7; 0/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: family and publisher holdouts improved on neutral predictions within evaluated coverage. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

GPQA: 42.3 observed win share
OpenAI, artificialanalysis.ai · Source 1 Source 2
ARC-AGI: 70.8 observed win share
Anthropic, OpenAI, arcprize.org · Source 1 Source 2 Source 3 Source 4 Source 5 Source 6
Humanity’s Last Exam: 31.1 observed win share
Anthropic, Google, OpenAI · Source 1 Source 2 Source 3 Source 4
FrontierMath: 0.0 observed win share
OpenAI · Source 1
Terminal-Bench Science: 50.0 observed win share
OpenAI · Source 1

Coding4 families · 1 with independent evidence · Supported92.5

4 core families; 28 direct opponents across 9 labs.

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: 83.2–93.7; 0/7 scenarios unsupported. Without one publisher: 84.7–93.9; 0/20 unsupported. Smoothing check: 85.5–95.2; 0/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: family and publisher holdouts improved on neutral predictions within evaluated coverage. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

DeepSWE: 76.3 observed win share
OpenAI, deepswe.datacurve.ai · Source 1 Source 2
SWE-bench Multilingual: 100.0 observed win share
Anthropic · Source 1
SWE-bench Pro: 33.3 observed win share
Anthropic · Source 1
Terminal-Bench: 69.4 observed win share
Anthropic, Google, OpenAI · Source 1 Source 2 Source 3 Source 4 Source 5

Human pref1 families · 1 with independent evidence · Supported56.3

1 core families; 114 direct opponents across 19 labs.

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: No supported estimate; 1/1 scenarios unsupported. Without one publisher: No supported estimate; 1/1 unsupported. Smoothing check: 53.0–60.8; 0/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: cross-family and cross-publisher predictions could not be evaluated from the available comparison network. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

Human preference (Arena): 96.5 observed win share
lmarena.ai · Source 1

Knowledge2 families · 0 with independent evidence · PreliminaryUnknown

2 core families; 2 direct opponents across 1 labs. No connected comparison to the complete reference panel

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: No supported estimate; 4/4 scenarios unsupported. Without one publisher: No supported estimate; 5/5 unsupported. Smoothing check: No supported estimate; 3/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: almost no publisher-held-out comparisons remained estimable. Cross-source validity is unresolved. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

Gmmlu: 0.0 observed win share
Anthropic · Source 1
Milu: 0.0 observed win share
Anthropic · Source 1

Multimodal3 families · 0 with independent evidence · Preliminary49.4

3 core families; 7 direct opponents across 3 labs. Needs broader benchmark and opponent support

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: No supported estimate; 8/8 scenarios unsupported. Without one publisher: No supported estimate; 8/8 unsupported. Smoothing check: No supported estimate; 3/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: limited publisher-held-out coverage. Cross-source validity is unresolved. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

Chartography: 0.0 observed win share
Anthropic · Source 1 Source 2
CharXiv: 20.0 observed win share
Google · Source 1
Lvbench: 100.0 observed win share
Google · Source 1

Long contextNo comparable evidenceUnknown

0 core families; 0 direct opponents across 0 labs. No admitted core comparisons

Estimated against the same complete panel: gpt-5.6-sol claude-opus-4-8 gemini-3.1-pro . Indirect comparisons assume performance can be summarized by one strength within this capability.

Refit without one family: No supported estimate; 5/5 scenarios unsupported. Without one publisher: No supported estimate; 5/5 unsupported. Smoothing check: No supported estimate; 3/3 unsupported. These are sensitivity checks, not confidence intervals.

Audit: family and publisher holdouts underperformed neutral predictions. Treat this as an exploratory estimate. Validation audit.

Matched family win shares below describe source evidence; they are not averaged to produce the adjusted score.

Scores estimate outcomes against a shared reference panel; they are not accuracy percentages. Sparse or disconnected evidence cannot qualify an overall profile. Open a capability to inspect its evidence.

Compare 6 effort levels across 68 benchmark/harness combinations →

Reported effort · Mixed settings

Settings reported in this model's published benchmark results, including results outside the aggregate. Effort names are provider-specific. These are not API defaults or equal compute budgets.

Auto thinking: 2 observations
Max: 19 observations
Not specified: 85 observations

Mixed settings means multiple settings occur in the evidence. Best across efforts means the source selected its best reported result across settings; it does not mean Max. Unspecified settings stay unknown. This model-summary chart combines reported settings. The leaderboard keeps identified configurations separate and excludes unknown effort.

Inspect each result and its source ↓ · Download effort evidence

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Score contributions and missing evidence

21 contributing families across 6 capabilities. Fixed reference panels do not change when the catalog expands.

Capability is fitted jointly across families. Capability estimates below describe different task areas; their weighted sum is not the Capability score.

Results without reviewed compatibility or a reference match remain in the raw evidence below. Coverage counts only contributing results.

Model information & shareable badge

Lab: Anthropic
Catalog status: active
Availability: Public provider catalog; account and region restrictions may apply
Family: Claude Opus
Released: —
Context: 1,000,000 tokens
License: proprietary
Model card: https://platform.claude.com/docs/en/about-claude/model-deprecations
Default Capability family coverage: /badge/claude-opus-5.svg

Benchmark scores & sources

Original results, evaluation harnesses, and evidence behind this model.

Benchmark	Bucket	Score	Harness	Evidence	Source-recorded date
AA-Briefcase	Supporting evidence	1685 Reported settings & source Artificial Analysis long-horizon knowledge projects; rubric and panel pairwise judging; Claude max effort. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.1.A;8.15.4 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
AA-Briefcase	Supporting evidence	57.2% Reported settings & source Artificial Analysis; max effort; component rubric pass. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.4 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
AA-Briefcase	Supporting evidence	1980 rating Reported settings & source Artificial Analysis; max effort; component analytical quality. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.4 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
AA-Briefcase	Supporting evidence	1572 rating Reported settings & source Artificial Analysis; max effort; component presentation. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.4 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
Agentic IF Index · internal	Supporting evidence	59.1 index Reported settings & source Internal composite instruction-following evaluations; no fixed task count; reasoning max Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
Agents' Last Exam · not specified	Supporting evidence	55.5% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Computer Use table / Agents' Last Exam / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
ARC-AGI · 1	Hard reasoning	97.5% Reported settings & source ARC Prize semi-private validation; verified Fable5.1 max effort; comparator figures as reported in summary. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.1.A;8.16 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
ARC-AGI · 2	Hard reasoning	90.42% Reported settings & source ARC Prize semi-private validation; verified Fable5.1 max effort; comparator figures as reported in summary. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.1.A;8.16 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
ARC-AGI-1 · 1	Hard reasoning	97.5% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Abstract Reasoning table / ARC-AGI-1 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
ARC-AGI-2	Hard reasoning	90.4%	ARC Prize verified Effort: Not specified contributes to capability	official board	2026-07-24
ARC-AGI-2 · 2	Hard reasoning	90.4% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Abstract Reasoning table / ARC-AGI-2 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
ARC-AGI-3 · 3	Hard reasoning	30.2% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Abstract Reasoning table / ARC-AGI-3 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Artificial Analysis Coding Agent Index v1.4 · v1.4	Supporting evidence	68.1 index score Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Coding table / Artificial Analysis Coding Agent Index v1.4 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
Artificial Analysis Intelligence Index	Supporting evidence	63	AA Intelligence Index Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-08-12
Artificial Analysis Intelligence Index v4.1.1 · v4.1.1	Supporting evidence	63.1 index score Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Professional table / Artificial Analysis Intelligence Index v4.1.1 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
AutomationBench	Agentic	26.9% Reported settings & source Private held-out board; simulated business-workflow app APIs; all assertions must pass; max effort stated for Fable5.1/Opus5. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.1.A;8.15.6 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
AutomationBench · not specified	Agentic	26.9% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Professional table / AutomationBench / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
AutomationBench · public v3	Agentic	50.3% Reported settings & source 600public workflow tasks; deterministic end-state assertions;pass@1; reasoning max Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
BenchCAD · not specified	Supporting evidence	82.1% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; tools enabled; three Anthropic evaluation modifications Provider-published result; comparator measurements are not automatically independently reproduced. Astra launch footnote5: Claude scores use three modifications described in the Fable5.1 system card; not same controlled setting. GPT-6 Astra: A new generation of intelligence · Professional table / BenchCAD / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
BenchCAD · Vision2Code 1000-file subset	Supporting evidence	0.366 voxel IoU Reported settings & source Random1000 of17900files; five runs; adaptive thinking max; no tools; corrected camera prompt, raw shapes accepted, last code fence parsed. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.14.2 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
BenchCAD · Vision2Code 1000-file subset	Supporting evidence	0.821 voxel IoU Reported settings & source Random1000 of17900files; five runs; adaptive thinking max; with tools; corrected camera prompt, raw shapes accepted, last code fence parsed. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.14.2 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
BioMysteryBench · Human Difficult	Supporting evidence	51.8% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
BioMysteryBench · Human Difficult	Supporting evidence	49.4% Reported settings & source Linuxterminal,bioinfotools,Python,R; allowlistednetwork; Gemini/GPTselfcomputed,Claudeproviderreports Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
BioMysteryBench · Human Solvable	Supporting evidence	91.4% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
BioMysteryBench · Human Solvable	Supporting evidence	90.1% Reported settings & source Linuxterminal,bioinfotools,Python,R; allowlistednetwork; Gemini/GPTselfcomputed,Claudeproviderreports Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
BrowseComp	Agentic	90.8%	BrowseComp reported Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-07-24
BrowseComp · not specified	Agentic	90.8% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Professional table / BrowseComp / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Chartography	Multimodal	29.6% Reported settings & source 100tasks; adaptive thinking max; five runs; no tools; tools condition has container, standard libraries and crop tool. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.14.1 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
Chartography	Multimodal	83% Reported settings & source 100tasks; adaptive thinking max; five runs; with tools; tools condition has container, standard libraries and crop tool. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.14.1 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
CharXiv Reasoning	Multimodal	83.7% Reported settings & source No tools; Gemini/GPT/Opus selfcomputed; Sonnet selfreported Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
CursorBench · 3.2.0	Supporting evidence	70% Reported settings & source Cursor production agent harness; independently measured by Cursor; max effort. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.8 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
DeepSearchQA	Agentic	90.4 percent F1 Reported settings & source 900questions; common search backend/browser harness; answer-set F1; reasoning max Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
DeepSWE v1.1	Coding	73.6%	DeepSWE v1.1 reported Effort: Not specified contributes to capability	official board	2026-09-03
DeepSWE v1.1 · v1.1	Coding	73.7% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Coding table / DeepSWE v1.1 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
ExploitBench · not specified	Supporting evidence	70% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; reduced or absent production safeguards Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Cybersecurity table / ExploitBench / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
ExploitGym · not specified	Supporting evidence	22% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; reduced or absent production safeguards; launch-reported configuration Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Cybersecurity table / ExploitGym / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
Finance Agent v2 · source release snapshot; version not specified	Supporting evidence	58.6% Reported settings & source Google launch chart; benchmark methodology linked on page; reported comparator settings vary. First-party reported result; comparator results retain the source evaluation setup. Gemini 3.8 Flash launch performance · Performance table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
FrontierCode 1.1 Extended (score) · 1.1	Supporting evidence	63.6% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Coding table / FrontierCode 1.1 Extended (score) / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
FrontierCode 1.1 Main (score) · 1.1	Supporting evidence	53.4% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Coding table / FrontierCode 1.1 Main (score) / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
FrontierMath Tier 4 (v2) · v2	Hard reasoning	73.2% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Academic table / FrontierMath Tier 4 (v2) / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
FrontierSWE · 2	Supporting evidence	0.52 fraction Reported settings & source Proximal agent harness; max effort; 34 tasks, five trials/task; mean score on 0..1 scale. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.5 · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
GDP.PDF	Supporting evidence	37% Reported settings & source All-pass rate; allmodels selfcomputed byGoogle Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
GDPval-AA	Agentic	1735	Artificial Analysis GDPval-AA Effort: Not specified contributes to capability	official board	2026-09-12
GDPval-AA · 2	Agentic	1824 Reported settings & source Artificial Analysis independent agentic shell/web evaluation;220GDPvalgoldtasks; blind pairwise Elo; max effort for Claude. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.1.A;8.15.3 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
GDPval-AA · 2	Agentic	1824 Reported settings & source Artificial Analysis publicboard snapshot; effort as reported Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
GDPval-AA · 2	Agentic	1824 Reported settings & source Artificial Analysis Stirrup shell/web harness;220tasks; blind pairwise comparisons; reasoning max Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
GMMLU	Knowledge	92.5% Reported settings & source Mean accuracy42languages; adaptive max; one trial; no tools/custom system prompts. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.18.1 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
GPQA Diamond	Hard reasoning	93.232%	GPQA Diamond reported Effort: Not specified contributes to capability	independent repro	2026-09-11
GPQA Diamond · not specified	Hard reasoning	93.7% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Academic table / GPQA Diamond / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Harvey Legal Agent Benchmark · source release snapshot; version not specified	Supporting evidence	6.7% Reported settings & source Google launch chart; benchmark methodology linked on page; reported comparator settings vary. First-party reported result; comparator results retain the source evaluation setup. Gemini 3.8 Flash launch performance · Performance table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
HealthBench	Supporting evidence	67.1% Reported settings & source Raw rubric score; adaptive max; five trials; no tools/custom system prompt; Opus4.8grader; Fable5.1 safety fallback toOpus5. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.17 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
HealthBench Professional	Supporting evidence	73.4% Reported settings & source Raw rubric score; adaptive max; five trials; no tools/custom system prompt; Opus4.8grader; Fable5.1 safety fallback toOpus5. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.17 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
HealthBench Professional	Supporting evidence	59.8% Reported settings & source Length-adjusted score; HealthBench Professional paper method; no tools; Opus4.8grader; five trials. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.1.A;8.17.2 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
HealthBench Professional (length-adjusted) · not specified	Supporting evidence	56.4% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; official paper scoring; length-adjusted; OpenAI reproduction; GPT-5.4 grader; unclipped Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Science And Health table / HealthBench Professional (length-adjusted) / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
HLE-Verified · source release snapshot; version not specified	Hard reasoning	54.4% Reported settings & source Google launch chart; benchmark methodology linked on page; reported comparator settings vary. First-party reported result; comparator results retain the source evaluation setup. Gemini 3.8 Flash launch performance · Performance table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Humanity's Last Exam	Hard reasoning	56.6%	HLE no tools Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-09-01
Humanity's Last Exam	Hard reasoning	56.3%	HLE no tools Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-07-24
Humanity's Last Exam	Hard reasoning	63.6%	HLE with tools Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-09-01
Humanity's Last Exam	Hard reasoning	64.7%	HLE with tools Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-07-24
Humanity’s Last Exam	Hard reasoning	56.6% Reported settings & source Full2500questions; no tools; auto thinking;1Mtotal token cap; no compaction; Opus4.6grader; restricted fetch and contamination review for tools. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table 8.1.A;8.12.1 · reviewed 2026-09-12	Published configuration Effort: Auto thinking contributes to capability	lab self-report	Reviewed 2026-09-12
Humanity’s Last Exam	Hard reasoning	63.6% Reported settings & source Full2500questions; with tools; auto thinking;1Mtotal token cap; no compaction; Opus4.6grader; restricted fetch and contamination review for tools. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table 8.1.A;8.12.1 · reviewed 2026-09-12	Published configuration Effort: Auto thinking contributes to capability	lab self-report	Reviewed 2026-09-12
Humanity's Last Exam (w/ tools) · not specified	Hard reasoning	63.6% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; tools enabled Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Academic table / Humanity's Last Exam (w/ tools) / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
JobBench	Supporting evidence	65.7% Reported settings & source 65tasks; mean rubric score; official OpenCode harness and file-aware grader; reasoning max Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
LABBench · 2	Supporting evidence	84.2% Reported settings & source Selfcomputed; Linuxterminal,bioinfotools,Python,R,network; macroaverage11subtasks Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
LMArena Text Arena	Human pref	1493	LMArena Text Effort: Not specified contributes to capability	official board	2026-09-11
LVBench · static	Multimodal	75.4% Reported settings & source No tools;1024frames Gemini/GPT,300frames Claude dueAPIlimit; model-specific frame budget: 300 Frame budgets differ; table labels Gemini3.8static explicitly. Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
MILU	Knowledge	92.1% Reported settings & source Mean accuracy11languages; adaptive max; five trials; no tools/custom system prompts. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.18.2 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
OfficeQA	Agentic	78.1% Reported settings & source Extracted-text Treasury corpus in sandbox; code execution; production Messages API with safeguards/fallback;128koutput cap. Pro133questions. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.1 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
OfficeQA Pro	Agentic	66.9% Reported settings & source Extracted-text Treasury corpus in sandbox; code execution; production Messages API with safeguards/fallback;128koutput cap. Pro133questions. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.15.1 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
Organic Chemistry · 2 revised	Supporting evidence	65.7% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
OSWorld · 2.0 August2026 task release	Agentic	75.4% Reported settings & source partial pass@1;108tasks; five runs;1080p;500steps; max effort; Opus4.8grader; task fixes; Fable safety interventions score zero. Same-condition reruns; supersedes earlier OSWorld2results and incompatible with previous task files. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.14.3 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
OSWorld · 2.0 August2026 task release	Agentic	39.6% Reported settings & source strict pass@1;108tasks; five runs;1080p;500steps; max effort; Opus4.8grader; task fixes; Fable safety interventions score zero. Same-condition reruns; supersedes earlier OSWorld2results and incompatible with previous task files. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.14.3 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
OSWorld 2.0 (v2026.08.08, offline set, partial score) · 2.0 / v2026.08.08 offline	Agentic	70.2% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; offline set; partial credit; v2026.08.08; official task/grading settings Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Computer Use table / OSWorld 2.0 (v2026.08.08, offline set, partial score) / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
OSWorld binary · 2.0 08.08	Agentic	31.4% Reported settings & source 108tasks; common internal GUI framework; execution-based checkers; binary metric; reasoning max Muse1.2 uses older06.24tasks; all others08.08. Do not compare these versions as identical. Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
OSWorld partial · 2.0 08.08	Agentic	68.3% Reported settings & source 108tasks; common internal GUI framework; execution-based checkers; partial metric; reasoning max Muse1.2 uses older06.24tasks; all others08.08. Do not compare these versions as identical. Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
OSWorld partial · 2.0 August2026 fixed tasks	Agentic	75.4% Reported settings & source Partialscore; batchtools;1080p/500steps; Gemini/Sonnet bestof3runs; screenshotonly; officialCUAharness Methodology says runs pre08.08patch but Opusvalue fromFable5.1card usesAugustfixedtasks; no controlledsameversionclaim. GPT values providerreports. Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Mixed source task revisions and best-of-three versus provider reporting prevent a uniform common-core unit.	Reviewed 2026-09-06
OSWorld-Verified	Agentic	83.39%	OSWorld-Verified reported Effort: Not specified contributes to capability	official board	2026-08-01
ProgramBench · 166 golden-task subset	Supporting evidence	85.4% Reported settings & source mini-swe-agent without six-hour timeout; excludes34flaky-reference tasks; tests restricted to reference-passing tests; up to1Mcontext. Hidden-test pass rate, not fraction of completely solved programs. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.11.1 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
Protein Design · Library Ranking	Supporting evidence	48% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
Protein Design · Sequence Generation revised grader	Supporting evidence	42.4% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
ProteinGym · Hard	Supporting evidence	47.7 percent rank correlation Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
Protocols · Troubleshooting	Supporting evidence	61.1% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
Protocols · Understanding network-restricted	Supporting evidence	80% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
SingleCellBench	Supporting evidence	60.6% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
SpatialBench · Verified	Supporting evidence	72.5% Reported settings & source Anthropic life-sciences evaluation; bash/editor/packages except protein design no tools; protocols use bash/editor/search; Understanding revised network restriction. Internal evaluation; not necessarily publicly released; compare only same task/grader revision. Percent rank correlation is not accuracy. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.19 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
SRE-Bench · 262 binaries / 19 programs	Supporting evidence	12.5% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API; reduced or absent production safeguards; pass@1; all six objectives required Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Cybersecurity table / SRE-Bench / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
SWE-Atlas Codebase QnA	Supporting evidence	52.7% Reported settings & source 124tasks/11repos; publicQnA mini-swe-agent rubric pass@1; GPT/Opus owncards; reasoning max Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
SWE-bench Multilingual	Coding	89.5% Reported settings & source Anthropic reported configuration; adaptive thinking at max effort, default sampling, five-trial mean unless section specifies otherwise; context at most 1M. Comparator configuration follows cited prior card or board. Agent identity is not established as mini-swe-agent. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table 8.1.A; section 8.2 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
SWE-bench Multimodal	Supporting evidence	59.4% Reported settings & source Anthropic reported configuration; adaptive thinking at max effort, default sampling, five-trial mean unless section specifies otherwise; context at most 1M. Comparator configuration follows cited prior card or board. Agent identity is not established as mini-swe-agent. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table 8.1.A; section 8.2 · reviewed 2026-09-12	Published configuration Effort: Not specified	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-12
SWE-bench Pro	Coding	79.2%	SWE-bench Pro reported Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-07-24
SWE-bench Pro	Coding	79.2% Reported settings & source Anthropic reported configuration; adaptive thinking at max effort, default sampling, five-trial mean unless section specifies otherwise; context at most 1M. Comparator configuration follows cited prior card or board. Agent identity is not established as mini-swe-agent. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table 8.1.A; section 8.2 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
SWE-bench Verified	Coding	96%	SWE-bench Verified official Effort: Not specified	lab self-report Legacy self-report lacks a reviewed comparison configuration	2026-07-24
Terminal-Bench · 2.1	Coding	89.1% Reported settings & source Terminus2only; Gemini selfcomputed, othermodels officialboard/ArtificialAnalysis Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Terminal-Bench · 2.1	Coding	86.7% Reported settings & source 89tasks; each model nativecoding harness in internalframework/cloudsandbox; officialverifier; GPT owncard; reasoning max; native harness family: Anthropic (exact harness revision not specified) Native harnesses differ; not a Terminus2-only comparison. Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: Not specified	lab self-report Different native coding harnesses are mixed; exact shared agent configuration is not established.	Reviewed 2026-09-06
Terminal-Bench · 4.0	Coding	52.3% Reported settings & source Claude Code --bare max effort, 15 trials/task over 66 tasks; Anthropic internal reruns. Uses more precise section values rather than rounded headline table. Distinct from2.1; timeouts/resources changed. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.6 · reviewed 2026-09-12	Published configuration Effort: Max contributes to capability	lab self-report	Reviewed 2026-09-12
Terminal-Bench · 4.0	Coding	51.8% Reported settings & source Officialpublicboard highest scoring thinking level; nativeagents may differ Gemini3.8Flash Model Card · Model card page5 Results table · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Terminal-Bench 4.0 · 4.0	Coding	52.6% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Coding table / Terminal-Bench 4.0 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Terminal-Bench Science 0.1 · not specified	Hard reasoning	30% Reported settings & source Maximum reported across reasoning efforts; OpenAI research environment or API Provider-published result; comparator measurements are not automatically independently reproduced. GPT-6 Astra: A new generation of intelligence · Academic table / Terminal-Bench Science 0.1 / Claude Opus 5 · reviewed 2026-09-06	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-06
Terminal-Bench-Science · 0.1	Coding	29% Reported settings & source 70tasks; Claude Code --bare max; Fable10trials/task, Opus12; GPT Codex CLI max from public board. Claude Fable 5.1 and Claude Mythos 5.1 System Card · 8.7 · reviewed 2026-09-12	Published configuration Effort: Not specified contributes to capability	lab self-report	Reviewed 2026-09-12
Toolathlon · Verified June2026	Agentic	80.6% Reported settings & source Pass@1;108tasks/three trials; internal harness; max effort; Fable safeguards+Opus4.8fallback; Opus safeguards/fallback disabled; pinned containers/data. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.15.5.A · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report No matched opponent in this evaluation unit	Reviewed 2026-09-12
Toolathlon · Verified June2026	Agentic	87% Reported settings & source Pass@3;108tasks/three trials; internal harness; max effort; Fable safeguards+Opus4.8fallback; Opus safeguards/fallback disabled; pinned containers/data. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.15.5.A · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report No matched opponent in this evaluation unit	Reviewed 2026-09-12
Toolathlon · Verified June2026	Agentic	73.1% Reported settings & source Pass³;108tasks/three trials; internal harness; max effort; Fable safeguards+Opus4.8fallback; Opus safeguards/fallback disabled; pinned containers/data. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.15.5.A · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report No matched opponent in this evaluation unit	Reviewed 2026-09-12
Toolathlon · Verified June2026	Agentic	23.5 turns Reported settings & source average turns;108tasks/three trials; internal harness; max effort; Fable safeguards+Opus4.8fallback; Opus safeguards/fallback disabled; pinned containers/data. Claude Fable 5.1 and Claude Mythos 5.1 System Card · Table8.15.5.A · reviewed 2026-09-12	Published configuration Effort: Max	lab self-report Metric turns is outside the task-success core	Reviewed 2026-09-12
VulcanBench v3	Supporting evidence	78.3%	VulcanBench v3 bare-bones API · Report 10 · high Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-07-26
VulcanBench v3	Supporting evidence	87%	VulcanBench v3 bare-bones API · Report 10 · low Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-07-26
VulcanBench v3	Supporting evidence	82.6%	VulcanBench v3 bare-bones API · Report 10 · medium Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-07-26
LiveCodeBench	Coding	—	—	—	—
MMLU-Pro	Knowledge	—	—	—	—
Terminal-Bench 2.1	Agentic	—	—	—	—