Claude Sonnet 5
Released 30 Jun 2026$2 input, $10 output per million tokens1.0M contextproprietaryAlso written as claude-sonnet-5
6 results on 6 of 13 boards, latest measured Sep 2026. Compare with other models
Clinical Benchmarks Index47.3Rank 18 of 1495 of 10 boardsAverage × multiplier 51.8 × 0.913 = 47.3This site’s own calculation. Working How it is computed
Results
Each line sits on its own board's scale. Tall tick: the board leader.
Clinical reasoning and knowledge
- HealthBench Professionallength-adjusted, Anthropic protocol: adaptive thinking at max effort, Claude Opus 4.8 grader, averaged over 5 trials, no tools or custom system prompt (raw 62.4%).0.578Rank 16 of 35Leader GPT-6 Astra (Anthropic run) 0.703
- 56.6Rank 7 of 8 here, 11 models on the boardLeader GPT-5.6 Sol 60.2
Documentation and coding
- MedScribe (Vals AI)model ID anthropic/claude-sonnet-5; temperature=1; max_output_tokens=30000; compute_effort=max76.05Rank 74 of 105Leader Claude Opus 5.5 91.43
- MedCode (Vals AI)model ID anthropic/claude-sonnet-5; compute_effort=max; temperature=1; max_output_tokens=3000047.54Rank 30 of 103Leader Claude Opus 5 63.57
EHR and workflow agents
- PhysicianBenchAnthropic harness; 100 tasks; pass@1; max effort; Opus 5 rubric grader; safety classifiers enabled37.4Rank 9 of 28 here, 12 models on the boardLeader Claude Opus 5.5 (max) 68.4
- CHI-BenchListed as claude-code + claude-sonnet-520.0Rank 13 of 43 here, 45 models on the boardLeader erius + claude-opus-5 54.7
Index working
The Clinical Benchmarks Index is this site's own calculation: a weighted average of the board scores times a multiplier for the boards behind it. How it is computed
- HealthBench Professional0.57857.8×0.743length-adjusted, Anthropic protocol: adaptive thinking at max effort, Claude Opus 4.8 grader, averaged over 5 trials, no tools or custom system prompt (raw 62.4%).
- MedScribe (Vals AI)76.0576.1×0.25, near its ceilingNear its ceiling: leader 91.4, weight 0.25model ID anthropic/claude-sonnet-5; temperature=1; max_output_tokens=30000; compute_effort=max
- MedCode (Vals AI)47.5447.5×0.911model ID anthropic/claude-sonnet-5; compute_effort=max; temperature=1; max_output_tokens=30000
- MAST (Medical AI Superintelligence Test)56.656.6×0.995
- PhysicianBench37.437.4×0.79Anthropic harness; 100 tasks; pass@1; max effort; Opus 5 rubric grader; safety classifiers enabled
- Weighted average of 5 boards
- 51.8
- Multiplier for 5 of 10 boards
- × 0.913
- Index
- 51.8 × 0.913 = 47.3
Score: the result on the board’s own 0 to 100 scale. Dot: this model; tick: the board’s leader. Weight: how much the board counts in the weighted average; bold where the board is near its ceiling and counts for less. Each result links to its quote and page; the line under it is the setting it was measured with.
Sources
The quote, page and document for each of the 6 results
16HealthBench Professional length-adjusted 0.578
Printed as 57.8Vendor-reported, measured Jun 2026Configuration: length-adjusted, Anthropic protocol: adaptive thinking at max effort, Claude Opus 4.8 grader, averaged over 5 trials, no tools or custom system prompt (raw 62.4%).System Card: Claude Sonnet 5 system card, Anthropic, 30 Jun 2026. p. 115, Table 8.1.A, row HealthBench Professional, column Claude Sonnet 5; Figure 8.12.2.A p. 139HealthBench Professional 57.8 44.2 51.8 -
Every result from this document- Also printed in System Card: Claude Opus 5: 57.8%, p. 189, section 8.15.2, Figure 8.15.2.A
74MedScribe (Vals AI) claude-sonnet-5 76.05
Printed as 76.05%Official leaderboard, measured Sep 2026Configuration: model ID anthropic/claude-sonnet-5; temperature=1; max_output_tokens=30000; compute_effort=maxVals AI MedScribe leaderboard official leaderboard, Vals AI, 3 Sep 2026. Vals AI MedScribe leaderboard, View: All Models, Task: Overall, row 74 of 105 (Claude Sonnet 5), Accuracy column; Updated 9/29/2026. Rendered BenchmarkView table; configuration from embedded astro-island BenchmarkView props, benchmarkView.default.tasks.overall["anthropic/claude-sonnet-5"].74 | Claude Sonnet 5 | 76.05%±3.05 | $2/$10 | 4m12s
Every result from this document30MedCode (Vals AI) claude-sonnet-5 47.54
Printed as 47.54%Official leaderboard, measured Sep 2026Configuration: model ID anthropic/claude-sonnet-5; compute_effort=max; temperature=1; max_output_tokens=30000Vals AI MedCode leaderboard official leaderboard, Vals AI, 29 Sep 2026. MedCode leaderboard, Overall task, All Models expanded, rank 30 of 103; Accuracy column; board Updated 9/29/2026. Rendered table row; configuration from embedded BenchmarkView props benchmarkView.default.tasks.overall["anthropic/claude-sonnet-5"].30 | Claude Sonnet 5 | 47.54%±2.27 | $2/$10 | 2m15s
Every result from this document7MAST (Medical AI Superintelligence Test) 56.6
Printed as 56.6%Official leaderboard, measured Aug 2026MAST: Medical AI Superintelligence Test leaderboard (General board) official leaderboard, ARISE AI Research Network, 15 Aug 2026. arise-ai.org/mast, 'Which AI can you trust for medical questions?' General tab, composite score table (8 of 11 models shown; 'Last updated August 15, 2026')7 Claude Sonnet 5 Anthropic 56.6%
Every result from this document9PhysicianBench Anthropic harness 37.4
Printed as 37.4%Vendor-reported, measured Sep 2026Configuration: Anthropic harness; 100 tasks; pass@1; max effort; Opus 5 rubric grader; safety classifiers enabledClaude Sonnet 5.5 System Card system card, Anthropic, 28 Sep 2026. pp. 138–139, Section 8.15.3; PhysicianBench pass@1, Claude Sonnet 5 (max).PhysicianBench is a public benchmark of 100 physician tasks carried out in an EHR. At max effort, Claude Sonnet 5.5 passes 63.2% of attempts, well above Claude Sonnet 5 (37.4%), level with Claude Fable 5.1 (61.0%), about 6 points above Claude Opus 5 (57.6%) and about 5 points below Claude Opus 5.5 (68.4%).
Every result from this document13CHI-Bench 20.0
Printed as 20.0%Official leaderboard, measured Jul 2026CHI-Bench leaderboard (actAVA) official leaderboard, actAVA, 12 Aug 2026. CHI-Bench v1.0.0, All Domains, rank 13, Agent/Model and Accuracy columns; PA/UM/CM follow; board last updated 2026-08-12; board Date column 2026-07-06; accessed 2026-09-30. Linked submission provenance: run 2026-07-02T04:22:04Z to 2026-07-02T04:31:46Z; submitted_at 2026-07-06T05:23:12Z.13 | claude-code | claude-sonnet-5 | Proprietary | 20.0% | 24.0% | 24.0% | 12.0% | 2026-07-06
Every result from this document- Also printed in CHI-Bench submission manifest: claude-code + anthropic/claude-sonnet-5, submission.model; provenance.started_at / finished_at; results.overall.pass_at_1; retrieved 2026-09-30
Other Anthropic models: Claude 3.7 Sonnet, Claude Fable 5, Claude Fable 5.1, Claude Haiku 4.5, Claude Haiku 5.5, Claude Opus 4.1, Claude Opus 4.5, Claude Opus 4.6, Claude Opus 4.7, Claude Opus 4.8, Claude Opus 5, Claude Opus 5.5, Claude Sonnet 4, Claude Sonnet 4.5, Claude Sonnet 4.6, Claude Sonnet 5.5