Claude Fable 5.1: healthcare benchmark results
Anthropic · 6 boards · updated September 8, 2026
The index currently holds 6 results for Claude Fable 5.1: 0.621 on HealthBench Professional (3 of 22 indexed rows), 60% on HealthBench (8 of 18 indexed rows), 84.9 on Health Optimization Bench (1 of 16 indexed rows), 53.51% on MedCode (Vals AI) (7 of 11 indexed rows), 91.29% on MedScribe (Vals AI) (1 of 12 indexed rows), 56 on Artificial Analysis Healthcare & Medical Index (1 of 12 indexed rows). It tops Health Optimization Bench and MedScribe (Vals AI) and Artificial Analysis Healthcare & Medical Index. Scores below sit on different scales and come from different graders, so read each against its own benchmark, never against the others.
Results by benchmark
| benchmark | score | index position | as of |
|---|---|---|---|
| HealthBench Professional | 0.621 | 3 of 22 | 2026-09 |
| HealthBench | 60% | 8 of 18 | 2026-09 |
| Health Optimization Bench | 84.9 | 1 of 16 | 2026-09 |
| MedCode (Vals AI) | 53.51% | 7 of 11 source board: 85 | 2026-09 |
| MedScribe (Vals AI) | 91.29% | 1 of 12 source board: 84 | 2026-09 |
| Artificial Analysis Healthcare & Medical Index | 56 | 1 of 12 source board: 23 | 2026-09 |
Position follows the rows held in this index, including separate configurations. A source board may contain additional rows; its size is listed separately when it differs. Config caveats, where a source noted any, are on each benchmark's page, and the document behind each score is cited on the sources page. Sources also list this model as "Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)".
Which healthcare benchmarks is Claude Fable 5.1 scored on?
As of September 8, 2026, Claude Fable 5.1 holds current results on 6 tracked benchmarks: HealthBench Professional, HealthBench, Health Optimization Bench, MedCode (Vals AI), MedScribe (Vals AI), Artificial Analysis Healthcare & Medical Index.
How does Claude Fable 5.1 rank on them?
Claude Fable 5.1 stands at 0.621 on HealthBench Professional (3 of 22 indexed rows), 60% on HealthBench (8 of 18 indexed rows), 84.9 on Health Optimization Bench (1 of 16 indexed rows), 53.51% on MedCode (Vals AI) (7 of 11 indexed rows), 91.29% on MedScribe (Vals AI) (1 of 12 indexed rows), 56 on Artificial Analysis Healthcare & Medical Index (1 of 12 indexed rows). It holds first place on Health Optimization Bench and MedScribe (Vals AI) and Artificial Analysis Healthcare & Medical Index.
The benchmarks themselves are described on their pages, linked in the table above, and the whole field is on the index.