HealthBench Professional

Anthropic logoClaude Sonnet 5 on HealthBench Professional

rank 4 of 9 · updated August 16, 2026

Claude Sonnet 5 scores 0.578 on HealthBench Professional, rank 4 of 9 evaluated models. Anthropic's mid-tier model, positioned for speed at near-Opus quality. HealthBench Professional scores models on 525 tasks drawn from real clinician conversations, graded criterion by criterion against physician-written rubrics on a 0 to 1 scale.

Result and API facts

rank4 of 9
score0.578
labAnthropic
context window1.0M tokens
API price per 1M tokens$2.00 in / $10.00 out
licenseproprietary
released2026-06-30

Position in the field

The gap to the leader, Claude Fable 5 at 0.660, is 0.082. Directly above sits Claude Opus 5 at 0.598. Directly below sits GPT-5.6 Terra at 0.577. Scores on this page come from the same evaluation run, so differences between models are differences on identical tasks, not across configurations.

What does Claude Sonnet 5 score on HealthBench Professional?

Claude Sonnet 5 scores 0.578 on HealthBench Professional, which places it at rank 4 of 9 evaluated models as of August 16, 2026.

How much does Claude Sonnet 5 cost to run?

Claude Sonnet 5 is priced at $2.00 per million input tokens and $10.00 per million output tokens through Anthropic's API.

Head to head

Pairings with a dedicated comparison page are linked; every other difference is in the score-difference matrix.

How tasks are selected and graded is on the methodology page. The full ranking is on the leaderboard.