HealthBench length-adjusted score (HealthBench (length-adjusted))
We show this table for reference; we do not rank on it.
HealthBench score after applying a verbosity penalty to model responses.
Benchmark score on HealthBench (length-adjusted) — September 27, 2026
We compile the HealthBench (length-adjusted) rows from provider self-reports. Claude Opus 5.5 leads the table at 60.6%, followed by GPT-6 Astra (58.3%) and Claude Opus 5 (57.8%). We do not use these results to rank models overall.
Claude Opus 5.5
Anthropic
GPT-6 Astra
OpenAI
Claude Opus 5
Anthropic
5 modelsKnowledgeCurrentDisplay onlyUpdated September 27, 2026
Benchmark score table (5 models)
ScoreAmong the reported HealthBench (length-adjusted) rows, Claude Opus 5.5 is first at 60.6%. The third row is 2.8 points behind. The broader top-10 range is 7.4 points, so many of the published results sit in a relatively narrow band.
5 models have been evaluated on HealthBench (length-adjusted). The benchmark falls in the Knowledge category. HealthBench (length-adjusted) is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.
About HealthBench (length-adjusted)
Year
2026
Tasks
5,000 multi-turn patient conversations
Format
Length-adjusted rubric score
Difficulty
Realistic healthcare conversations
Section 8.15.1 reports the length-adjusted result separately from the raw score. All Claude models used max effort, no tools, and five trials.
Freshness and provenance
Version
HealthBench (length-adjusted) 2026
Refresh cadence
Quarterly
Staleness state
Current
Question availability
Public benchmark set
BenchLM uses freshness metadata to decide whether a benchmark should still be treated as a strong differentiator, a benchmark to watch, or a display-only reference. For the full scoring policy, see the BenchLM methodology page.
Questions
What does HealthBench (length-adjusted) measure?
HealthBench score after applying a verbosity penalty to model responses.
Which model scores highest on HealthBench (length-adjusted)?
Claude Opus 5.5 by Anthropic currently leads with a score of 60.6% on HealthBench (length-adjusted).
How many models are evaluated on HealthBench (length-adjusted)?
5 AI models have been evaluated on HealthBench (length-adjusted) on BenchLM.
Compare top models on HealthBench (length-adjusted)
Know when it’s worth switching models
The model to choose, the cheaper alternative, and the release we would wait on.
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