Benchmark profile
HealthBench Hard
A harder subset of OpenAI's HealthBench for evaluating open-ended medical and health reasoning with rubric-based grading.
Data verifiedBenchmark score on HealthBench Hard — July 23, 2026
BenchLM mirrors the published score view for HealthBench Hard. Muse Spark leads the public snapshot at 42.8% , followed by GPT-5.4 (40.1%) and GPT-5.6 Sol (33.1%). BenchLM does not use these results to rank models overall.
Muse Spark
Meta
muse-spark
GPT-5.4
OpenAI
gpt-5-4
GPT-5.6 Sol
OpenAI
gpt-5-6-sol
Benchmark score table (8 models)
ScoreThe published HealthBench Hard snapshot places Muse Spark first at 42.8%. The third row is 9.7 points behind. The broader top-10 range is 28.0 points, so the table still separates the published systems.
8 models have been evaluated on HealthBench Hard. The benchmark falls in the Knowledge category. This category carries a 12% weight in BenchLM.ai's overall scoring system. HealthBench Hard is currently displayed for reference but excluded from the scoring formula, so it does not directly affect overall rankings.
About HealthBench Hard
Year
2026
Tasks
1,000 health prompts
Format
Open-ended health evaluation
Difficulty
Advanced health reasoning
Meta describes HealthBench Hard as a 1,000-prompt subset of OpenAI's HealthBench, graded with the same simple-evals implementation and a GPT-4.1-based judge. BenchLM treats it as a display-only health benchmark reference.
BenchLM freshness & provenance
Version
HealthBench Hard 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.
FAQ
What does HealthBench Hard measure?
A harder subset of OpenAI's HealthBench for evaluating open-ended medical and health reasoning with rubric-based grading.
Which model scores highest on HealthBench Hard?
Muse Spark by Meta currently leads with a score of 42.8% on HealthBench Hard.
How many models are evaluated on HealthBench Hard?
8 AI models have been evaluated on HealthBench Hard on BenchLM.
Compare Top Models on HealthBench Hard
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