GPT-5.3 Chat: healthcare benchmark results
OpenAI · 3 boards · updated September 8, 2026
The index currently holds 3 results for GPT-5.3 Chat: 0.259 on HealthBench Hard (13 of 16 indexed rows), 54.1% on HealthBench (7 of 18 indexed rows), 0.985 on OpenAI Dynamic Mental Health Evaluations (6 of 15 indexed rows). Scores below sit on different scales and come from different graders, so read each against its own benchmark, never against the others.
Results by benchmark
| benchmark | score | index position | as of |
|---|---|---|---|
| HealthBench Hard | 0.259 | 13 of 16 | 2026-03 |
| HealthBench | 54.1% | 7 of 18 | 2026-03 |
| OpenAI Dynamic Mental Health Evaluations | 0.985 | 6 of 15 | 2026-03 |
Position follows the rows held in this index, including separate configurations. A source board may contain additional rows; its size is listed separately when it differs. Config caveats, where a source noted any, are on each benchmark's page, and the document behind each score is cited on the sources page. Sources also list this model as "GPT-5.3 Instant".
Which healthcare benchmarks is GPT-5.3 Chat scored on?
As of September 8, 2026, GPT-5.3 Chat holds current results on 3 tracked benchmarks: HealthBench Hard, HealthBench, OpenAI Dynamic Mental Health Evaluations.
How does GPT-5.3 Chat rank on them?
GPT-5.3 Chat stands at 0.259 on HealthBench Hard (13 of 16 indexed rows), 54.1% on HealthBench (7 of 18 indexed rows), 0.985 on OpenAI Dynamic Mental Health Evaluations (6 of 15 indexed rows).
The benchmarks themselves are described on their pages, linked in the table above, and the whole field is on the index.