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RankingClaude Sonnet 5.5

Claude Sonnet 5.5

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Data updated 30 Sept 2026

2 published benchmark measures · 0 benchmark families contribute across 0 task areas. 0 capability estimates available in the full profile. See all results ↓ · Compare published benchmarks →

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Model evidence summary

This profile combines published settings. It is not a runnable configuration or a leaderboard rank. Compare measured configurations →

Performance profile

Capabilities

Adjusted comparison score · 0–100
Claude Sonnet 5.5 capability radarComparison scores from 0 to 100. Unknown capabilities have no point; lines stop at gaps. Hollow points are preliminary. Exact values and support labels follow the chart.AgenticHard reasoningCodingHuman prefKnowledgeMultimodalLong context50100

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

AgenticNo 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; 13/13 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.

    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; 6/6 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.

      CodingNo 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; 6/6 scenarios unsupported. Without one publisher: No supported estimate; 19/19 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.

        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 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.

                Reported effort · Not specified

                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.

                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
                Score contributions and missing evidence

                0 contributing families across 0 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 Sonnet
                Released
                2026-09-28
                Context
                1,000,000 tokens
                API list price
                $2 input / $10 output per million tokens
                License
                proprietary
                Model card
                https://platform.claude.com/docs/en/models/sonnet-5-5/overview
                Default Capability family coverage
                Documented-evidence family coverage/badge/claude-sonnet-5-5.svg
                Benchmark scores & sources

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

                BenchmarkBucketScoreHarnessEvidenceSource-recorded date
                AutomationBench-AASupporting evidence71.32534614553299%Artificial Analysis AutomationBench-AA

                Effort: Not specified

                		official board

                Supporting evidence outside the reviewed capability core

                		2026-09-29
                Bug Hunt BenchSupporting evidence48.86%Bug Hunt Bench · max

                Effort: Not specified

                		official board

                Supporting evidence outside the reviewed capability core

                		2026-09-29
                ARC-AGI-2Hard reasoning————
                DeepSWE v1.1Agentic————
                GDPval-AAAgentic————
                GPQA DiamondHard reasoning————
                Humanity's Last ExamHard reasoning————
                LiveCodeBenchCoding————
                LMArena Text ArenaHuman pref————
                MMLU-ProKnowledge————
                OSWorld-VerifiedAgentic————
                SWE-bench ProAgentic————
                SWE-bench VerifiedAgentic————
                Terminal-Bench 2.1Agentic————