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HealthBench (independent run) leaderboard (Oct 2026): AI model scores

As of our last check on 22 Oct 2026 (the source shows no leaderboard date), the highest reported Moonshot score on HealthBench (independent run) is Kimi K3 (max) (Moonshot) at 54.7%, #9 on that leaderboard, per Artificial Analysis.

What it measures

OpenAI’s 5,000 health conversations, each graded against a rubric written by physicians.

5,000 realistic health conversations, each graded against a rubric written by physicians; HealthBench Professional covers clinician use cases.

What the score means

Length-adjusted score: share of rubric points earned

Share of physician-rubric points earned, adjusted for answer length (long answers lose points), as OpenAI reports it.

Results from published AI leaderboards. Compare models within each benchmark; scores from different tests aren’t directly comparable. How we collect these results

Scores by model

Run by Artificial Analysis (benchmark by OpenAI). Leaderboard date not shown. Last checked 22 Oct 2026.

Highlight a provider: Anthropic OpenAI Google xAI DeepSeek Z.ai Moonshot

Highlighting Moonshot models. Other providers are dimmed. Show all providers

  • Anthropic
  • OpenAI
  • Google
  • xAI
  • DeepSeek
  • Z.ai
  • Moonshot
HealthBench (independent run): HealthBench Professional vs HealthBenchScatter plot of 14 models. Leader on HealthBench Professional: GPT-6 Astra (max) at 66.0%. Moonshot models highlighted. Full values in the table below.45%50%55%60%50%55%60%65%HEALTHBENCHHEALTHBENCH PROFESSIONALGemini 3.8 Flash (high) (Google): HealthBench 48.4%, HealthBench Professional 51.7%GGemini 4 Argon (high) (Google): HealthBench 49.1%, HealthBench Professional 55.1%GGPT-6 Sol (max) (OpenAI): HealthBench 54.2%, HealthBench Professional 62.3%OGLM-5.3 (max) (Z.ai): HealthBench 54.5%, HealthBench Professional 52.8%ZGPT-6 Luna (max) (OpenAI): HealthBench 54.6%, HealthBench Professional 61.9%OGrok 4.7 (xhigh) (xAI): HealthBench 56.0%, HealthBench Professional 55.8%XClaude Opus 5.5 (max with fallback) (Anthropic): HealthBench 57.0%, HealthBench Professional 59.9%AClaude Fable 5.1 (max with fallback) (Anthropic): HealthBench 57.2%, HealthBench Professional 57.8%AGPT-6 Astra (max) (OpenAI): HealthBench 58.2%, HealthBench Professional 66.0%OClaude Haiku 5.5 (max) (Anthropic): HealthBench 58.5%, HealthBench Professional 58.4%AGPT-6.1 Sol (max) (OpenAI): HealthBench 58.5%, HealthBench Professional 65.1%ODeepSeek V4.1 Flash (max) (DeepSeek): HealthBench 60.9%, HealthBench Professional 50.7%DClaude Sonnet 5.5 (max with fallback) (Anthropic): HealthBench 62.1%, HealthBench Professional 63.0%AKimi K3 (max) (Moonshot): HealthBench 54.7%, HealthBench Professional 53.2%KKimi K3GPT-6 Astra
HealthBench (independent run): HealthBench Professional vs HealthBenchScatter plot of 14 models. Leader on HealthBench Professional: GPT-6 Astra (max) at 66.0%. Moonshot models highlighted. Full values in the table below.45%50%55%60%50%55%60%65%HEALTHBENCHHEALTHBENCH PROFESSIONALGemini 3.8 Flash (high) (Google): HealthBench 48.4%, HealthBench Professional 51.7%GGemini 4 Argon (high) (Google): HealthBench 49.1%, HealthBench Professional 55.1%GGPT-6 Sol (max) (OpenAI): HealthBench 54.2%, HealthBench Professional 62.3%OGLM-5.3 (max) (Z.ai): HealthBench 54.5%, HealthBench Professional 52.8%ZGPT-6 Luna (max) (OpenAI): HealthBench 54.6%, HealthBench Professional 61.9%OGrok 4.7 (xhigh) (xAI): HealthBench 56.0%, HealthBench Professional 55.8%XClaude Opus 5.5 (max with fallback) (Anthropic): HealthBench 57.0%, HealthBench Professional 59.9%AClaude Fable 5.1 (max with fallback) (Anthropic): HealthBench 57.2%, HealthBench Professional 57.8%AGPT-6 Astra (max) (OpenAI): HealthBench 58.2%, HealthBench Professional 66.0%OClaude Haiku 5.5 (max) (Anthropic): HealthBench 58.5%, HealthBench Professional 58.4%AGPT-6.1 Sol (max) (OpenAI): HealthBench 58.5%, HealthBench Professional 65.1%ODeepSeek V4.1 Flash (max) (DeepSeek): HealthBench 60.9%, HealthBench Professional 50.7%DClaude Sonnet 5.5 (max with fallback) (Anthropic): HealthBench 62.1%, HealthBench Professional 63.0%AKimi K3 (max) (Moonshot): HealthBench 54.7%, HealthBench Professional 53.2%KKimi K3GPT-6 Astra
HealthBench (independent run): top 14 by HealthBenchBars from zero. Leader: Claude Sonnet 5.5 (max with fallback) at 62.1%. Moonshot models highlighted. Full values in the table below.0%20%40%60%80%Claude Sonnet 5.5 (max with fallback) (Anthropic), rank 1: 62.1%AClaude Sonnet 5.562.1%DeepSeek V4.1 Flash (max) (DeepSeek), rank 2: 60.9%DDeepSeek V4.1 Flash60.9%GPT-6.1 Sol (max) (OpenAI), rank 3: 58.5%OGPT-6.1 Sol58.5%Claude Haiku 5.5 (max) (Anthropic), rank 4: 58.5%AClaude Haiku 5.558.5%GPT-6 Astra (max) (OpenAI), rank 5: 58.2%OGPT-6 Astra58.2%Claude Fable 5.1 (max with fallback) (Anthropic), rank 6: 57.2%AClaude Fable 5.157.2%Claude Opus 5.5 (max with fallback) (Anthropic), rank 7: 57.0%AClaude Opus 5.557.0%Grok 4.7 (xhigh) (xAI), rank 8: 56.0%XGrok 4.756.0%Kimi K3 (max) (Moonshot), rank 9: 54.7%KKimi K354.7%GPT-6 Luna (max) (OpenAI), rank 10: 54.6%OGPT-6 Luna54.6%GLM-5.3 (max) (Z.ai), rank 11: 54.5%ZGLM-5.354.5%GPT-6 Sol (max) (OpenAI), rank 12: 54.2%OGPT-6 Sol54.2%Gemini 4 Argon (high) (Google), rank 13: 49.1%GGemini 4 Argon49.1%Gemini 3.8 Flash (high) (Google), rank 14: 48.4%GGemini 3.8 Flash48.4%
HealthBench (independent run): top 12 by HealthBenchBars from zero. Leader: Claude Sonnet 5.5 (max with fallback) at 62.1%. Moonshot models highlighted. Full values in the table below.0%25%50%75%Claude Sonnet 5.5 (max with fallback) (Anthropic), rank 1: 62.1%AClaude Sonnet 5.562.1%DeepSeek V4.1 Flash (max) (DeepSeek), rank 2: 60.9%DDeepSeek V4.1 Fl…60.9%GPT-6.1 Sol (max) (OpenAI), rank 3: 58.5%OGPT-6.1 Sol58.5%Claude Haiku 5.5 (max) (Anthropic), rank 4: 58.5%AClaude Haiku 5.558.5%GPT-6 Astra (max) (OpenAI), rank 5: 58.2%OGPT-6 Astra58.2%Claude Fable 5.1 (max with fallback) (Anthropic), rank 6: 57.2%AClaude Fable 5.157.2%Claude Opus 5.5 (max with fallback) (Anthropic), rank 7: 57.0%AClaude Opus 5.557.0%Grok 4.7 (xhigh) (xAI), rank 8: 56.0%XGrok 4.756.0%Kimi K3 (max) (Moonshot), rank 9: 54.7%KKimi K354.7%GPT-6 Luna (max) (OpenAI), rank 10: 54.6%OGPT-6 Luna54.6%GLM-5.3 (max) (Z.ai), rank 11: 54.5%ZGLM-5.354.5%GPT-6 Sol (max) (OpenAI), rank 12: 54.2%OGPT-6 Sol54.2%
HealthBench (independent run): Professional (raw) vs HealthBench (raw)Scatter plot of 14 models. Leader on Professional (raw): Claude Opus 5.5 (max with fallback) at 71.4%. Moonshot models highlighted. Full values in the table below.45%50%55%60%65%50%55%60%65%70%HEALTHBENCH (RAW)PROFESSIONAL (RAW)Gemini 3.8 Flash (high) (Google): HealthBench (raw) 57.1%, Professional (raw) 59.0%GGemini 4 Argon (high) (Google): HealthBench (raw) 60.0%, Professional (raw) 64.2%GGPT-6 Sol (max) (OpenAI): HealthBench (raw) 48.2%, Professional (raw) 61.2%OGLM-5.3 (max) (Z.ai): HealthBench (raw) 54.7%, Professional (raw) 57.9%ZGPT-6 Luna (max) (OpenAI): HealthBench (raw) 50.5%, Professional (raw) 62.7%OGrok 4.7 (xhigh) (xAI): HealthBench (raw) 54.2%, Professional (raw) 57.4%XClaude Opus 5.5 (max with fallback) (Anthropic): HealthBench (raw) 64.3%, Professional (raw) 71.4%AClaude Fable 5.1 (max with fallback) (Anthropic): HealthBench (raw) 63.9%, Professional (raw) 69.2%AGPT-6 Astra (max) (OpenAI): HealthBench (raw) 56.9%, Professional (raw) 69.7%OClaude Haiku 5.5 (max) (Anthropic): HealthBench (raw) 61.2%, Professional (raw) 64.8%AGPT-6.1 Sol (max) (OpenAI): HealthBench (raw) 56.9%, Professional (raw) 68.3%ODeepSeek V4.1 Flash (max) (DeepSeek): HealthBench (raw) 61.9%, Professional (raw) 52.9%DClaude Sonnet 5.5 (max with fallback) (Anthropic): HealthBench (raw) 65.9%, Professional (raw) 70.8%AKimi K3 (max) (Moonshot): HealthBench (raw) 54.2%, Professional (raw) 56.9%KKimi K3Claude Opus 5.5
HealthBench (independent run): Professional (raw) vs HealthBench (raw)Scatter plot of 14 models. Leader on Professional (raw): Claude Opus 5.5 (max with fallback) at 71.4%. Moonshot models highlighted. Full values in the table below.45%50%55%60%65%50%55%60%65%70%HEALTHBENCH (RAW)PROFESSIONAL (RAW)Gemini 3.8 Flash (high) (Google): HealthBench (raw) 57.1%, Professional (raw) 59.0%GGemini 4 Argon (high) (Google): HealthBench (raw) 60.0%, Professional (raw) 64.2%GGPT-6 Sol (max) (OpenAI): HealthBench (raw) 48.2%, Professional (raw) 61.2%OGLM-5.3 (max) (Z.ai): HealthBench (raw) 54.7%, Professional (raw) 57.9%ZGPT-6 Luna (max) (OpenAI): HealthBench (raw) 50.5%, Professional (raw) 62.7%OGrok 4.7 (xhigh) (xAI): HealthBench (raw) 54.2%, Professional (raw) 57.4%XClaude Opus 5.5 (max with fallback) (Anthropic): HealthBench (raw) 64.3%, Professional (raw) 71.4%AClaude Fable 5.1 (max with fallback) (Anthropic): HealthBench (raw) 63.9%, Professional (raw) 69.2%AGPT-6 Astra (max) (OpenAI): HealthBench (raw) 56.9%, Professional (raw) 69.7%OClaude Haiku 5.5 (max) (Anthropic): HealthBench (raw) 61.2%, Professional (raw) 64.8%AGPT-6.1 Sol (max) (OpenAI): HealthBench (raw) 56.9%, Professional (raw) 68.3%ODeepSeek V4.1 Flash (max) (DeepSeek): HealthBench (raw) 61.9%, Professional (raw) 52.9%DClaude Sonnet 5.5 (max with fallback) (Anthropic): HealthBench (raw) 65.9%, Professional (raw) 70.8%AKimi K3 (max) (Moonshot): HealthBench (raw) 54.2%, Professional (raw) 56.9%KKimi K3Claude Opus 5.5
HealthBench
Share of physician-rubric points earned, adjusted for answer length (long answers lose points), as OpenAI reports it.
HealthBench Professional
Same scoring on clinician-facing tasks (consults, writing, research), length-adjusted.
HealthBench (raw)
Share of rubric points earned with no length adjustment.
Professional (raw)
HealthBench Professional with no length adjustment.
Mean answer length (characters)
Average reply length, excluding reasoning.

All scores

HealthBench (independent run) scores, Moonshot models highlighted
RankModelProviderHealthBenchHealthBench ProfessionalHealthBench (raw)Professional (raw)Mean answer length (characters)
1 Claude Sonnet 5.5 (max with fallback)Anthropic62.1%63.0%65.9%70.8%2,634
2 DeepSeek V4.1 Flash (max)DeepSeek60.9%50.7%61.9%52.9%2,164
3 GPT-6.1 Sol (max)OpenAI58.5%65.1%56.9%68.3%1,732
4 Claude Haiku 5.5 (max)Anthropic58.5%58.4%61.2%64.8%2,457
5 GPT-6 Astra (max)OpenAI58.2%66.0%56.9%69.7%1,780
6 Claude Fable 5.1 (max with fallback)Anthropic57.2%57.8%63.9%69.2%3,113
7 Claude Opus 5.5 (max with fallback)Anthropic57.0%59.9%64.3%71.4%3,217
8 Grok 4.7 (xhigh)xAI56.0%55.8%54.2%57.4%1,691
9 Kimi K3 (max)Moonshot54.7%53.2%54.2%56.9%1,919
10 GPT-6 Luna (max)OpenAI54.6%61.9%50.5%62.7%1,325
Show 4 more rows
RankModelProviderHealthBenchHealthBench ProfessionalHealthBench (raw)Professional (raw)Mean answer length (characters)
11 GLM-5.3 (max)Z.ai54.5%52.8%54.7%57.9%2,036
12 GPT-6 Sol (max)OpenAI54.2%62.3%48.2%61.2%1,008
13 Gemini 4 Argon (high)Google49.1%55.1%60.0%64.2%3,837
14 Gemini 3.8 Flash (high)Google48.4%51.7%57.1%59.0%3,467

Source: Artificial Analysis leaderboard ↗ · About HealthBench (OpenAI) ↗

Best-ranked Moonshot model here: Kimi K3 (max) (Moonshot). Browse prompts for any model →