Claude Opus 5
Released 24 Jul 2026$5 input, $25 output per million tokens1.0M contextproprietaryAlso written as Claude Opus 5 (Adaptive Reasoning, Max Effort), claude-opus-5, Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)Compare with other models
- Clinical Benchmarks Index
- 80.6rank 11 of 148; 80.6 × 1 = 80.6, from 6 of 10 boards
- Boards
- 8 of 13
- Results
- 9
- Latest measurement
- Sep 2026
Results
Each line is placed on its own board. Dark 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 73.4%).0.598Rank 11 of 31Leader GPT-6 Astra (Anthropic run) 0.703
- 57.1Rank 6 of 8 here, 11 models on the boardLeader GPT-5.6 Sol 60.2
Documentation and coding
- 90.98Rank 4 of 105Leader Claude Opus 5.5 91.43
- 63.57Rank 1 of 103Leads this board
EHR and workflow agents
- PhysicianBenchAnthropic harness; 100 tasks; pass@1; max effort; Opus 5 rubric grader; safety classifiers enabled57.6Rank 4 of 21 here, 12 models on the boardLeader Claude Opus 5.5 (max) 68.4
- 55Rank 1 of 12Leads this board
- CHI-BenchListed as erius + claude-opus-5community-submitted harness config validated by automated workspace judge54.7Rank 1 of 43 here, 45 models on the boardLeads this board
- CHI-BenchListed as claude-code + claude-opus-537.3Rank 2 of 43 here, 45 models on the boardLeader erius + claude-opus-5 54.7
Safety
- First, Do NOHARM (v2)v2 run on ARISE; 19 models on the board74.6Rank 6 of 17 here, 19 models on the boardLeader LiSA 2.5 86.2
Sources
Open a line for the quote and page.
11HealthBench Professional length-adjusted, Anthropic protocol: adaptive thinking at max effort, Claude Op… 0.598
Printed as 59.8%Vendor-reported, measured Jul 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 73.4%).System Card: Claude Opus 5 system card, Anthropic, 24 Jul 2026. p. 189, section 8.15.2 HealthBench Professional results; also Table 8.1.A p. 152 ('HealthBench Professional 59.8 ...')Claude Opus 5 achieved a raw score of 73.4%, which is the highest amongst all Claude models, ahead of Claude Mythos 5 at 70.3%, Claude Opus 4.8 at 60.3%, and Claude Sonnet 5 at 62.4%. After length adjustment, which penalizes verbose model responses, Claude Opus 5 achieved a score of 59.8%.
Every result from this document- Also printed in Claude Fable 5.1 and Claude Mythos 5.1 System Card: 59.8%, p. 167, Table 8.1.A, column 'Claude Opus 5'; raw 73.4% also reprinted on p. 199, sec. 8.17.2
4MedScribe (Vals AI) 90.98
Printed as 90.98%Official leaderboard, measured Sep 2026Vals AI MedScribe leaderboard official leaderboard, Vals AI, 3 Sep 2026. Vals AI MedScribe leaderboard, View: All Models, Task: Overall, row 4 of 105 (Claude Opus 5), Accuracy column; Updated 9/29/2026. Rendered BenchmarkView table; configuration from embedded astro-island BenchmarkView props, benchmarkView.default.tasks.overall["anthropic/claude-opus-5"].4 | Claude Opus 5 | 90.98%±1.92 | $5/$25 | 76.56s
Every result from this document1MedCode (Vals AI) 63.57
Printed as 63.57%Official leaderboard, measured Sep 2026Vals AI MedCode leaderboard official leaderboard, Vals AI, 29 Sep 2026. MedCode leaderboard, Overall task, All Models expanded, rank 1 of 103; Accuracy column; board Updated 9/29/2026. Rendered table row; configuration from embedded BenchmarkView props benchmarkView.default.tasks.overall["anthropic/claude-opus-5"].1 | Claude Opus 5 | 63.57%±1.99 | $5/$25 | 24.50s
Every result from this document6MAST (Medical AI Superintelligence Test) 57.1
Printed as 57.1%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')6 Claude Opus 5 Anthropic 57.1%
Every result from this document6First, Do NOHARM (v2) v2 run on ARISE; 19 models on the board 74.6
Printed as 74.6%Official leaderboard, measured Aug 2026Configuration: v2 run on ARISE; 19 models on the boardMAST technical leaderboard (First Do NOHARM v2 and per-benchmark results) official leaderboard, ARISE AI Research Network, 15 Aug 2026. arise-ai.org/mast/technical, 'First Do NOHARM v2 overall metric across 19 models' ranking (Latest Flagships view), plus Model Leaderboard SAFETY column6Claude Opus 5Anthropic 74.6%
Every result from this document4PhysicianBench Anthropic harness; 100 tasks; pass@1; max effort; Opus 5 rubric grader; safety… 57.6
Printed as 57.6%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 Opus 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 document1HealthAgentBench $3.3/task; harness+model evaluated jointly 55
Printed as 55%Official leaderboard, measured Jul 2026Configuration: $3.3/task; harness+model evaluated jointlyHealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 1, Success Rate column1 Claude Code (Opus 5) 55% $3.3
Every result from this document- Also printed in HealthAgentBench detailed results: 55%, Detailed results table, rank 1
1CHI-Bench community-submitted harness config validated by automated workspace judge 54.7
Printed as 54.7%Independent run, measured Aug 2026Configuration: community-submitted harness config validated by automated workspace judgeCHI-Bench leaderboard (actAVA) official leaderboard, actAVA, 12 Aug 2026. CHI-Bench v1.0.0, All Domains, rank 01, Agent/Model and Accuracy columns; PA/UM/CM follow; board last updated 2026-08-12; board Date column 2026-07-26; accessed 2026-09-30.01 | erius submitted by Michael Johnson (MJ) | claude-opus-5 | Proprietary | 54.7% | 72.0% | 36.0% | 56.0% | 2026-07-26
Every result from this document- Also printed in CHI-Bench submission manifest: erius + anthropic/claude-opus-5, submission.model; provenance.started_at / finished_at; results.overall.pass_at_1; retrieved 2026-09-30
2CHI-Bench 37.3
Printed as 37.3%Official leaderboard, measured Jul 2026CHI-Bench leaderboard (actAVA) official leaderboard, actAVA, 12 Aug 2026. CHI-Bench v1.0.0, All Domains, rank 03, Agent/Model and Accuracy columns; PA/UM/CM follow; board last updated 2026-08-12; board Date column 2026-07-24; accessed 2026-09-30. Linked submission provenance: run 2026-07-24T19:08:02Z to 2026-07-24T23:22:36Z; submitted_at 2026-08-12T20:20:00Z.03 | claude-code | claude-opus-5 | Proprietary | 37.3% | 20.0% | 32.0% | 60.0% | 2026-07-24
Every result from this document- Also printed in CHI-Bench submission manifest: claude-code + anthropic/claude-opus-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 Opus 4.1, Claude Opus 4.5, Claude Opus 4.6, Claude Opus 4.7, Claude Opus 4.8, Claude Opus 5.5, Claude Sonnet 4, Claude Sonnet 4.5, Claude Sonnet 4.6, Claude Sonnet 5, Claude Sonnet 5.5