# HealthBench (hard, length-adjusted) — AI model rankings

physician rubric score on the hard subset of the original HealthBench evaluation, adjusted for answer length

3 tracked models have a published HealthBench (hard, length-adjusted) score. Higher is better. Scores come from published lab reports and benchmark sources; recorded sources appear beside the scores.

## Ranking

| Rank | Model | Developer | Score | Source | Released |
| --- | --- | --- | --- | --- | --- |
| 1 | GPT-6 Astra | OpenAI | 36.6% | Lab | Sep 3 2026 |
| 2 | GPT-6 Luna | OpenAI | 31.4% | Lab | Sep 22 2026 |
| 3 | GPT-6 Sol | OpenAI | 30.1% | Lab | Sep 22 2026 |


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Canonical page: https://aireleasetracker.com/benchmark/healthbench-hard-length-adjusted
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.