GPT-6.1 Sol on HealthBench Professional

rank 6 of 32 · updated October 6, 2026

GPT-6.1 Sol scores 0.642 on HealthBench Professional, rank 6 of 32 models on the board. HealthBench Professional scores models on 525 tasks drawn from real clinician conversations, graded criterion by criterion against physician-written rubrics on a 0 to 1 scale.

Result and API facts

rank	6 of 32
score	0.642
lab	OpenAI
context window	1.05M tokens
API price per 1M tokens	$2.00 in / $10.00 out
license	proprietary
source	Addendum to GPT-6 Astra System Card: GPT-6.1 Sol (system card)
released	2026-09-29

Position in the field

The gap to the leader, GPT-6 Astra (Anthropic run) at 0.703, is 0.061. Directly above sits GPT-6 Astra at 0.647. Directly below sits Claude Fable 5 (September card) at 0.633. The scores on this page are compiled from published documents rather than from one controlled run, so a small gap between 2 models can reflect a difference in grader version, reasoning effort, or deployment setting as well as a difference in capability.

Source of this score

Read from Addendum to GPT-6 Astra System Card: GPT-6.1 Sol (system card, OpenAI, 2026-09-29). Vendor-reported. Confidence: verified. Configuration: OpenAI; length-adjusted; 64.2 (67.2, 3038) (adjusted, raw, mean response characters); addendum Table 7 refers to the GPT-6 Astra card for method.

EVALUATION | GPT-5.5 | GPT-5.6 SOL | GPT-5.6 TERRA | GPT-5.6 LUNA | GPT-6 ASTRA | GPT-6 SOL | GPT-6 LUNA | GPT-6.1 SOL HealthBench Professional length-adjusted | 51.8 (57.2, 3818) | 60.5 (64.1, 3228) | 57.7 (62.4, 3618) | 55.7 (59.8, 3389) | 64.7 (68.2, 3185) | 60.8 (59.5, 1573) | 60.8 (61.2, 2119) | 64.2 (67.2, 3038)

Section 5.1, Table 7, HealthBench Professional length-adjusted, GPT-6.1 Sol column · full entry on the sources page

What does GPT-6.1 Sol score on HealthBench Professional?

GPT-6.1 Sol scores 0.642 on HealthBench Professional, which places it at rank 6 of 32 models on the board as of October 6, 2026. The number was read from Addendum to GPT-6 Astra System Card: GPT-6.1 Sol, listed on the sources page.

How much does GPT-6.1 Sol cost to run?

GPT-6.1 Sol is priced at $2.00 per million input tokens and $10.00 per million output tokens through OpenAI's API.

Head to head

Pairings with a dedicated comparison page are linked; every other difference is in the score-difference matrix.

GPT-6.1 Sol vs GPT-6 Astra (Anthropic run)
0.642 vs 0.703 · GPT-6 Astra (Anthropic run) by 0.061
GPT-6.1 Sol vs Claude Sonnet 5.5
0.642 vs 0.692 · Claude Sonnet 5.5 by 0.050
GPT-6.1 Sol vs Claude Fable 5
0.642 vs 0.660 · Claude Fable 5 by 0.018
GPT-6.1 Sol vs Claude Opus 5.5
0.642 vs 0.656 · Claude Opus 5.5 by 0.014
GPT-6.1 Sol vs GPT-6 Astra
0.642 vs 0.647 · GPT-6 Astra by 0.005
GPT-6.1 Sol vs Claude Fable 5 (September card)
0.642 vs 0.633 · GPT-6.1 Sol by 0.009
GPT-6.1 Sol vs Claude Fable 5.1
0.642 vs 0.621 · GPT-6.1 Sol by 0.021
GPT-6.1 Sol vs GPT-6 Luna
0.642 vs 0.608 · GPT-6.1 Sol by 0.034
GPT-6.1 Sol vs GPT-6 Sol
0.642 vs 0.608 · GPT-6.1 Sol by 0.034
GPT-6.1 Sol vs GPT-5.6 Sol
0.642 vs 0.605 · GPT-6.1 Sol by 0.037
GPT-6.1 Sol vs Claude Opus 5
0.642 vs 0.598 · GPT-6.1 Sol by 0.044
GPT-6.1 Sol vs Muse Spark 1.1
0.642 vs 0.593 · GPT-6.1 Sol by 0.049
GPT-6.1 Sol vs Claude Sonnet 5
0.642 vs 0.578 · GPT-6.1 Sol by 0.064
GPT-6.1 Sol vs GPT-5.6 Terra
0.642 vs 0.577 · GPT-6.1 Sol by 0.065
GPT-6.1 Sol vs Claude Opus 4.8 (Opus 4.8 grader)
0.642 vs 0.574 · GPT-6.1 Sol by 0.068
GPT-6.1 Sol vs Grok 4.7
0.642 vs 0.567 · GPT-6.1 Sol by 0.075
GPT-6.1 Sol vs Claude Opus 4.8
0.642 vs 0.558 · GPT-6.1 Sol by 0.084
GPT-6.1 Sol vs GPT-5.6 Luna
0.642 vs 0.557 · GPT-6.1 Sol by 0.085
GPT-6.1 Sol vs Muse Spark
0.642 vs 0.541 · GPT-6.1 Sol by 0.101
GPT-6.1 Sol vs GPT-5.6 Sol (August)
0.642 vs 0.540 · GPT-6.1 Sol by 0.102
GPT-6.1 Sol vs Claude Opus 4.7
0.642 vs 0.519 · GPT-6.1 Sol by 0.123
GPT-6.1 Sol vs GPT-5.5
0.642 vs 0.518 · GPT-6.1 Sol by 0.124
GPT-6.1 Sol vs Grok 4.6
0.642 vs 0.485 · GPT-6.1 Sol by 0.157
GPT-6.1 Sol vs GPT-5.4
0.642 vs 0.481 · GPT-6.1 Sol by 0.161
GPT-6.1 Sol vs GPT-5
0.642 vs 0.462 · GPT-6.1 Sol by 0.180
GPT-6.1 Sol vs GPT-5.2
0.642 vs 0.459 · GPT-6.1 Sol by 0.183
GPT-6.1 Sol vs Claude Sonnet 4.6
0.642 vs 0.442 · GPT-6.1 Sol by 0.200
GPT-6.1 Sol vs GPT-5.6 Luna (August)
0.642 vs 0.441 · GPT-6.1 Sol by 0.201
GPT-6.1 Sol vs GPT-5.1
0.642 vs 0.396 · GPT-6.1 Sol by 0.246
GPT-6.1 Sol vs GPT-5.5 Instant
0.642 vs 0.384 · GPT-6.1 Sol by 0.258
GPT-6.1 Sol vs MAI-Thinking-1
0.642 vs 0.350 · GPT-6.1 Sol by 0.292

Where the scores come from and how they are read is on the methodology page. The full ranking is on the leaderboard.