RankingMuse Spark 1.2

Muse Spark 1.2

Data updated 12 Sept 2026

12 published benchmark measures · 5 benchmark families contribute across 3 task areas. 3 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.

Agentic3 families · 0 with independent evidence · Preliminary23.3

3 core families; 1 direct opponents across 1 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; 11/11 scenarios unsupported. Without one publisher: No supported estimate; 15/15 unsupported. Smoothing check: No supported estimate; 3/3 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.

AutomationBench: 0.0 observed win share
Meta · Source 1
GDPval: 0.0 observed win share
Meta · Source 1
DeepSearchQA: 0.0 observed win share
Meta · Source 1

Hard reasoningNo 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; 7/7 scenarios unsupported. Without one publisher: No supported estimate; 16/16 unsupported. Smoothing check: No supported estimate; 3/3 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.

Coding1 families · 1 with independent evidence · Preliminary36.9

1 core families; 27 direct opponents across 9 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; 7/7 scenarios unsupported. Without one publisher: No supported estimate; 20/20 unsupported. Smoothing check: No supported estimate; 3/3 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: 40.7 observed win share
deepswe.datacurve.ai · Source 1

Human prefNo 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; 1/1 scenarios unsupported. Without one publisher: No supported estimate; 1/1 unsupported. Smoothing check: No supported estimate; 3/3 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.

KnowledgeNo 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; 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.

MultimodalNo 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; 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.

Long context1 families · 0 with independent evidence · Preliminary70.0

1 core families; 1 direct opponents across 1 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; 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.

MRCR: 0.0 observed win share
Meta · Source 1 Source 2

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 3 effort levels across 50 benchmark/harness combinations →

Reported effort · XHigh + unspecified

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.

XHigh: 12 observations
Not specified: 4 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

Compare capability profiles →

Score contributions and missing evidence

5 contributing families across 3 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: Meta
Catalog status: availability-unverified
Availability: Documented Meta Model API; current version-specific serving requires authenticated verification
Family: Muse Spark
Released: 2026-08-05
Context: —
License: proprietary
Model card: https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2
Default Capability family coverage: /badge/muse-spark-1.2.svg

Benchmark scores & sources

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

Benchmark	Bucket	Score	Harness	Evidence	Source-recorded date
Agentic IF Index · internal	Supporting evidence	46.2 index Reported settings & source Internal composite instruction-following evaluations; no fixed task count; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
AutomationBench · public v3	Agentic	38.2% Reported settings & source 600public workflow tasks; deterministic end-state assertions;pass@1; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh contributes to capability	lab self-report	Reviewed 2026-09-06
DeepSearchQA	Agentic	85.9 percent F1 Reported settings & source 900questions; common search backend/browser harness; answer-set F1; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh contributes to capability	lab self-report	Reviewed 2026-09-06
DeepSWE · 1.1	Coding	55% Reported settings & source 113tasks; Muse1.3mini-swe-agent; comparators officialDatacurve board; reasoning xhigh Opus74 omitted because Google current methodology explicitly identifies that board-rounded value as incorrect; underlying precision unresolved. Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh	lab self-report No matched opponent in this evaluation unit	Reviewed 2026-09-06
DeepSWE v1.1	Coding	54.9%	DeepSWE v1.1 reported Effort: Not specified contributes to capability	official board	2026-09-03
GDPval-AA · 2	Agentic	1615 Reported settings & source Artificial Analysis Stirrup shell/web harness;220tasks; blind pairwise comparisons; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh contributes to capability	lab self-report	Reviewed 2026-09-06
JobBench	Supporting evidence	61.6% Reported settings & source 65tasks; mean rubric score; official OpenCode harness and file-aware grader; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
MRCR · v2 256K-512K	Long context	66.3 percent sequence match Reported settings & source 8needle;100examples/band rebinned byo200k_base; no tools; sequence-matcher ratio; GPT fromOpenAIcard; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh contributes to capability	lab self-report	Reviewed 2026-09-06
MRCR · v2 512K-1M	Long context	55.5 percent sequence match Reported settings & source 8needle;100examples/band rebinned byo200k_base; no tools; sequence-matcher ratio; GPT fromOpenAIcard; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh contributes to capability	lab self-report	Reviewed 2026-09-06
OSWorld binary · 2.0 06.24	Agentic	17.9% Reported settings & source 108tasks; common internal GUI framework; execution-based checkers; binary metric; reasoning xhigh 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: XHigh	lab self-report No matched opponent in this evaluation unit	Reviewed 2026-09-06
OSWorld partial · 2.0 06.24	Agentic	47.6% Reported settings & source 108tasks; common internal GUI framework; execution-based checkers; partial metric; reasoning xhigh 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: XHigh	lab self-report No matched opponent in this evaluation unit	Reviewed 2026-09-06
SWE-Atlas Codebase QnA	Supporting evidence	46.2% Reported settings & source 124tasks/11repos; publicQnA mini-swe-agent rubric pass@1; GPT/Opus owncards; reasoning xhigh Muse Spark1.3 evaluation methodology · PDF page4 performance table · reviewed 2026-09-06	Published configuration Effort: XHigh	lab self-report Supporting evidence outside the reviewed capability core	Reviewed 2026-09-06
Terminal-Bench · 2.1	Coding	82.9% Reported settings & source 89tasks; each model nativecoding harness in internalframework/cloudsandbox; officialverifier; GPT owncard; reasoning xhigh; native harness family: Meta (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: XHigh	lab self-report Different native coding harnesses are mixed; exact shared agent configuration is not established.	Reviewed 2026-09-06
VulcanBench v3	Supporting evidence	73.9%	VulcanBench v3 bare-bones API · Report 19 · high Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-08-25
VulcanBench v3	Supporting evidence	87%	VulcanBench v3 bare-bones API · Report 19 · low Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-08-25
VulcanBench v3	Supporting evidence	52.2%	VulcanBench v3 bare-bones API · Report 19 · xhigh Effort: Not specified	official board Supporting evidence outside the reviewed capability core	2026-08-25
ARC-AGI-2	Hard reasoning	—	—	—	—
GDPval-AA	Agentic	—	—	—	—
GPQA Diamond	Hard reasoning	—	—	—	—
Humanity's Last Exam	Hard reasoning	—	—	—	—
LiveCodeBench	Coding	—	—	—	—
LMArena Text Arena	Human pref	—	—	—	—
MMLU-Pro	Knowledge	—	—	—	—
OSWorld-Verified	Agentic	—	—	—	—
SWE-bench Pro	Agentic	—	—	—	—
SWE-bench Verified	Agentic	—	—	—	—
Terminal-Bench 2.1	Agentic	—	—	—	—