Clinical Benchmarks
Menu

Claude Sonnet 4.5

Released 29 Sep 2025$3 input, $15 output per million tokensproprietaryAlso written as claude-sonnet-4-5-20250929, claude-sonnet-4-5-20250929-thinking, anthropic/claude-sonnet-4-5-20250929-thinking, anthropic/claude-sonnet-4-5-20250929, Claude Sonnet 4.5 (Nonthinking), Claude Sonnet 4.5 (Thinking)

4 results on 2 of 13 boards, latest measured Sep 2026. Compare with other models

Clinical Benchmarks Index30.5Rank 54 of 1492 of 10 boardsAverage × multiplier 52.8 × 0.577 = 30.5This site’s own calculation. Working How it is computed

Results

Each line sits on its own board's scale. Tall tick: the board leader.

Documentation and coding

  1. MedScribe (Vals AI)
    model ID anthropic/claude-sonnet-4-5-20250929; temperature=1; max_output_tokens=30000
    84.52
    Rank 31 of 105Leader Claude Opus 5.5 91.43
    Official leaderboard
    Measured Sep 2026
  2. MedScribe (Vals AI)
    model ID anthropic/claude-sonnet-4-5-20250929-thinking; temperature=1; max_output_tokens=30000
    84.10
    Rank 36 of 105Leader Claude Opus 5.5 91.43
    Official leaderboard
    Measured Sep 2026
  3. MedCode (Vals AI)
    model ID anthropic/claude-sonnet-4-5-20250929-thinking; temperature=1; max_output_tokens=30000
    44.13
    Rank 39 of 103Leader Claude Opus 5 63.57
    Official leaderboard
    Measured Sep 2026
  4. MedCode (Vals AI)
    model ID anthropic/claude-sonnet-4-5-20250929; temperature=1; max_output_tokens=30000
    40.57
    Rank 59 of 103Leader Claude Opus 5 63.57
    Official leaderboard
    Measured Sep 2026

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

  • MedScribe (Vals AI)84.5284.5×0.25, near its ceilingNear its ceiling: leader 91.4, weight 0.25model ID anthropic/claude-sonnet-4-5-20250929; temperature=1; max_output_tokens=30000
  • MedCode (Vals AI)44.1344.1×0.911model ID anthropic/claude-sonnet-4-5-20250929-thinking; temperature=1; max_output_tokens=30000
Weighted average of 2 boards
52.8
Multiplier for 2 of 10 boards
× 0.577
Index
52.8 × 0.577 = 30.5

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 4 results
  1. 31MedScribe (Vals AI) claude-sonnet-4-5-20250929 84.52
    Printed as 84.52%Official leaderboard, measured Sep 2026Configuration: model ID anthropic/claude-sonnet-4-5-20250929; temperature=1; max_output_tokens=30000
    Vals AI MedScribe leaderboard official leaderboard, Vals AI, 3 Sep 2026. Vals AI MedScribe leaderboard, View: All Models, Task: Overall, row 31 of 105 (Claude Sonnet 4.5 (Nonthinking)), Accuracy column; Updated 9/29/2026. Rendered BenchmarkView table; configuration from embedded astro-island BenchmarkView props, benchmarkView.default.tasks.overall["anthropic/claude-sonnet-4-5-20250929"].
    31 | Claude Sonnet 4.5 (Nonthinking) | 84.52%±1.93 | $3/$15 | 44.42s
    Every result from this document
  2. 36MedScribe (Vals AI) claude-sonnet-4-5-20250929-thinking 84.10
    Printed as 84.10%Official leaderboard, measured Sep 2026Configuration: model ID anthropic/claude-sonnet-4-5-20250929-thinking; temperature=1; max_output_tokens=30000
    Vals AI MedScribe leaderboard official leaderboard, Vals AI, 3 Sep 2026. Vals AI MedScribe leaderboard, View: All Models, Task: Overall, row 36 of 105 (Claude Sonnet 4.5 (Thinking)), Accuracy column; Updated 9/29/2026. Rendered BenchmarkView table; configuration from embedded astro-island BenchmarkView props, benchmarkView.default.tasks.overall["anthropic/claude-sonnet-4-5-20250929-thinking"].
    36 | Claude Sonnet 4.5 (Thinking) | 84.10%±1.87 | $3/$15 | 67.92s
    Every result from this document
  3. 39MedCode (Vals AI) claude-sonnet-4-5-20250929-thinking 44.13
    Printed as 44.13%Official leaderboard, measured Sep 2026Configuration: model ID anthropic/claude-sonnet-4-5-20250929-thinking; temperature=1; max_output_tokens=30000
    Vals AI MedCode leaderboard official leaderboard, Vals AI, 29 Sep 2026. MedCode leaderboard, Overall task, All Models expanded, rank 39 of 103; Accuracy column; board Updated 9/29/2026. Rendered table row; configuration from embedded BenchmarkView props benchmarkView.default.tasks.overall["anthropic/claude-sonnet-4-5-20250929-thinking"].
    39 | Claude Sonnet 4.5 (Thinking) | 44.13%±2.00 | $3/$15 | 74.33s
    Every result from this document
  4. 59MedCode (Vals AI) claude-sonnet-4-5-20250929 40.57
    Printed as 40.57%Official leaderboard, measured Sep 2026Configuration: model ID anthropic/claude-sonnet-4-5-20250929; temperature=1; max_output_tokens=30000
    Vals AI MedCode leaderboard official leaderboard, Vals AI, 29 Sep 2026. MedCode leaderboard, Overall task, All Models expanded, rank 59 of 103; Accuracy column; board Updated 9/29/2026. Rendered table row; configuration from embedded BenchmarkView props benchmarkView.default.tasks.overall["anthropic/claude-sonnet-4-5-20250929"].
    59 | Claude Sonnet 4.5 (Nonthinking) | 40.57%±2.00 | $3/$15 | 12.01s
    Every result from this document

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 4.6, Claude Sonnet 5, Claude Sonnet 5.5