Who ranks #1 on the HealthBench leaderboard?
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on HealthBench at 66.7%. API pricing is $10.00/M input and $50.00/M output.
As of September 2, 2026, Claude Fable 5.1 is #1 for HealthBench at 66.7%. Ranked by HealthBench: medical conversation quality, not multiple-choice science. 11 models in this index have a published HealthBench score. HealthBench leaderboard with live API prices. HealthBench — OpenAI health dialogue and medical reasoning benchmark.
11 models. Left is cheaper. Up is a higher score. The line is the best score you can buy at each price — a dot under it is a worse deal than something on the line.
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The index
347 models across 36 providers. Search or jump to a lab — every model page stays linked here.









As of September 2, 2026, Claude Fable 5.1 by Anthropic is #1 for HealthBench at 66.7%. Ranked by HealthBench: medical conversation quality, not multiple-choice science. This board also tracks HealthBench. Next on the same board: Claude Mythos 5.1 and Qwen3.8 Max. This healthbench leaderboard ranks models by HealthBench. Scores come from public evals. Prices are the live API rates in the table above.
Sources: OpenAI API pricing (https://developers.openai.com/api/docs/pricing); Anthropic Claude API pricing (https://platform.claude.com/docs/en/about-claude/pricing); Gemini API pricing (https://ai.google.dev/gemini-api/docs/pricing)
| Rank | Model | HealthBench | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude Fable 5.1 | 66.7% | $10.00 | $50.00 |
| 2 | Claude Mythos 5.1 | 66.7% | $10.00 | $50.00 |
| 3 | Qwen3.8 Max | 60.2% | $2.00 | $6.00 |
| 4 | Kimi K2-Thinking-0905 | 58% | $0.47 | $2.00 |
| 5 | GPT OSS 120B | 57.6% | $0.09 | $0.45 |
| 6 | GPT-5.6 Sol | 57% | $5.00 | $30.00 |
| 7 | GPT-5.6 Terra | 57% | $2.00 | $12.00 |
| 8 | GPT-5.6 Luna | 55.8% | $0.20 | $1.20 |
Rank one eval at a time. All LLM benchmarks.
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on HealthBench at 66.7%. API pricing is $10.00/M input and $50.00/M output.
The current HealthBench ranking as of September 2, 2026 is 1. Claude Fable 5.1 at 66.7%; 2. Claude Mythos 5.1 at 66.7%; 3. Qwen3.8 Max at 60.2%.
GPT OSS 20B is the cheapest scored model on this healthbench leaderboard at $0.05/M input and $0.20/M output ($0.25 blended). Claude Fable 5.1 still leads HealthBench at 66.7%.
Not automatically. Claude Fable 5.1 leads HealthBench, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh HealthBench against input/output price, context window, and related evals.
Scores and API prices on this page are refreshed from published evals and provider rates. The snapshot is labeled September 2, 2026. Treat it as a current index, not a one-off blog post.
HealthBench — OpenAI health dialogue and medical reasoning benchmark. This page ranks models that have published a HealthBench score, with live API token prices on the same row.
This page is the HealthBench leaderboard. Models are sorted by HealthBench, with input and output token prices on the same row so you can weigh score against cost. Official boards often omit price; that comparison is the point of this index.
Official eval pages own the methodology. This page keeps the published HealthBench score next to live API $/M so you can pick a production SKU, not only a trophy number.