HealthBench Hard Benchmark Leaderboard | Phaseo

HealthBench Hard

Type: percentageHealth

Recorded Results

15

Average Score

23.87%

Score Range

9% - 46.20%

Leading Model (lowest score)

9% - GPT OSS 20b

Scores Over Time

Individual benchmark scores plotted by date.

Models Using This Benchmark

Organisation	Model	Reported	Top Score	Info	Self Reported	Source
OpenAI	GPT OSS Safeguard 20b	29 Oct 2025	10.80%	inferred high-confidence family alias from gpt-oss-20b (score=0.5137; benches=7)	Yes	Source
OpenAI	GPT OSS 20b	05 Aug 2025	12.90%	Medium Reasoning Effort	Yes	Source
ByteDance	Seed 2.0 Mini	14 Feb 2026	15.30%	Seed2 official benchmark table \| HealthBench - Hard	Yes	Source
ByteDance	Seed 2.0 Lite	14 Feb 2026	20%	Seed2 official benchmark table \| HealthBench - Hard	Yes	Source
OpenAI	GPT 5.3 Chat	03 Mar 2026	25.90%	-	Yes	Source
ByteDance	Seed 2.0 Pro	14 Feb 2026	29.10%	Seed2 official benchmark table \| HealthBench - Hard	Yes	Source
OpenAI	GPT OSS 120b	05 Aug 2025	30%	High Reasoning Effort	Yes	Source
OpenAI	GPT OSS Safeguard 120b	29 Oct 2025	30%	inferred high-confidence family alias from gpt-oss-120b (score=0.5102; benches=7)	Yes	Source
Meta	Muse Spark	08 Apr 2026	42.80%	Open-ended health queries	Yes	Source
OpenAI	GPT 5	07 Aug 2025	46.20%	With Thinking	Yes	Source