HealthAgentBench

1. 1Claude Code (Opus 5)Anthropic · $3.3/task55
   Printed as 55%Official leaderboard, measured Jul 2026Configuration: $3.3/task; harness+model evaluated jointly

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 1, Success Rate column

   1 Claude Code (Opus 5) 55% $3.3

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 55%, Detailed results table, rank 1

   Link to this row

2. 2Codex (GPT-5.6-sol)OpenAI · $5.2/task45
   Printed as 45%Official leaderboard, measured Jul 2026Configuration: $5.2/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 2, Success Rate column

   2 Codex (GPT-5.6-sol) 45% $5.2

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 45%, Detailed results table, rank 2

   Link to this row

3. 3Codex (GPT 5.5)OpenAI · $2.8/task42
   Printed as 42%Official leaderboard, measured Jul 2026Configuration: $2.8/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 3, Success Rate column

   3 Codex (GPT 5.5) 42% $2.8

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 42%, Detailed results table, rank 3
   • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 42%, p. 11, Figure 4 (pooled task success rate, ten agents)

   Link to this row

4. 4MACopilot (Opus 4.8)Microsoft/Anthropic · $3.1/task36
   Printed as 36%Official leaderboard, measured Jul 2026Configuration: $3.1/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 4, Success Rate column

   4 Copilot (Opus 4.8) 36% $3.1

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 36%, Detailed results table, rank 4
   • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 36%, p. 11, Figure 4 (pooled task success rate, ten agents)

   Link to this row

5. 5MOCopilot (GPT 5.5)Microsoft/OpenAI · $2.6/task35
   Printed as 35%Official leaderboard, measured Jul 2026Configuration: $2.6/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 5, Success Rate column

   5 Copilot (GPT 5.5) 35% $2.6

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 35%, Detailed results table, rank 5
   • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 35%, p. 11, Figure 4 (pooled task success rate, ten agents)

   Link to this row

6. 6Claude Code (Opus 4.8)Anthropic · $4.0/task32
   Printed as 32%Official leaderboard, measured Jul 2026Configuration: $4.0/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 6, Success Rate column

   6 Claude Code (Opus 4.8) 32% $4.0

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 32%, Detailed results table, rank 6
   • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 32%, p. 11, Figure 4 (pooled task success rate, ten agents)

   Link to this row

7. 7Codex (GPT 5.4)OpenAI · $1.3/task28
   Printed as 28%Official leaderboard, measured Jul 2026Configuration: $1.3/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 7, Success Rate column

   7 Codex (GPT 5.4) 28% $1.3

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 28%, Detailed results table, rank 7
   • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 28%, p. 11, Figure 4 (pooled task success rate, ten agents)

   Link to this row

8. 8Claude Code (Opus 4.7)Anthropic · $4.8/task27
   Printed as 27%Official leaderboard, measured Jul 2026Configuration: $4.8/task

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 8, Success Rate column

   8 Claude Code (Opus 4.7) 27% $4.8

   Every result from this document

   • Also printed in HealthAgentBench detailed results: 27%, Detailed results table, rank 8
   • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 27%, p. 11, Figure 4 (pooled task success rate, ten agents)

   Link to this row

9. 9Codex (GPT 5.3)OpenAI · $1.0/task22
   Printed as 22%Official leaderboard, measured Jul 2026Configuration: $1.0/task; Codex harness; mean success across 3 attempts × 54 tasks

   HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Homepage leaderboard, rank 9, Success Rate and cost/task; displayed 2026-09-30.

   Agent | Success Rate | cost/task Codex (GPT 5.3) 22% $1.0

   Every result from this document

   Link to this row

10. 10Claude Code (Opus 4.6)Anthropic · $4.1/task19
    Printed as 19%Official leaderboard, measured Jul 2026Configuration: $4.1/task

    HealthAgentBench leaderboard official leaderboard, Microsoft Research (HealthAgentBench), 27 Jul 2026. Leaderboard table (homepage), rank 10, Success Rate column

    10 Claude Code (Opus 4.6) 19% $4.1

    Every result from this document

    • Also printed in HealthAgentBench detailed results: 19%, Detailed results table, rank 10
    • Also printed in HealthAgentBench: A Unified Benchmark Suite of Realistic Agentic Healthcare Environments for Challenging Frontier AI Agents (arXiv 2606.31179v1): 19%, p. 11, Figure 4 (pooled task success rate, ten agents)

    Link to this row

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Mean task success rate, 0-100%, higher better; cost per task also reported. Bar colour: the lab; a pale bar with an outline is a number the model’s own lab reported. Select a row for its quote, page and document.