Models

9 models evaluated · updated August 16, 2026

The whole board in one table, together with the API facts that determine whether a score matters in practice: context window, list price per token, license. Every model links through to a page with its full result and head-to-head comparisons.

Ranking

#	model		score	size	context	cost in / out per 1M	license
1		Muse Spark Meta	0.428	—	1.0M	$1.25 / $4.25	proprietary
2		GPT-5.6 Sol OpenAI	0.331	—	1.1M	$5.00 / $30.00	proprietary
3		GPT-5.6 Terra OpenAI	0.327	—	1.1M	$2.00 / $12.00	proprietary
4		GPT-5.6 Luna OpenAI	0.320	—	1.1M	$0.20 / $1.20	proprietary
5		GPT OSS 120B OpenAI	0.300	117B	131K	—	open
6		GPT-5.3 Chat OpenAI	0.259	—	128K	$1.75 / $14.00	proprietary
7		GPT-5.5 Instant OpenAI	0.229	—	400K	$5.00 / $30.00	proprietary
8		GPT OSS 20B OpenAI	0.108	21B	131K	—	open
9		GPT-5 OpenAI	0.016	—	400K	$1.25 / $10.00	proprietary

Model pages

• Muse Spark on HealthBench Hard
  rank 1 of 9 · score 0.428 · Meta
• GPT-5.6 Sol on HealthBench Hard
  rank 2 of 9 · score 0.331 · OpenAI
• GPT-5.6 Terra on HealthBench Hard
  rank 3 of 9 · score 0.327 · OpenAI
• GPT-5.6 Luna on HealthBench Hard
  rank 4 of 9 · score 0.320 · OpenAI
• GPT OSS 120B on HealthBench Hard
  rank 5 of 9 · score 0.300 · OpenAI
• GPT-5.3 Chat on HealthBench Hard
  rank 6 of 9 · score 0.259 · OpenAI
• GPT-5.5 Instant on HealthBench Hard
  rank 7 of 9 · score 0.229 · OpenAI
• GPT OSS 20B on HealthBench Hard
  rank 8 of 9 · score 0.108 · OpenAI
• GPT-5 on HealthBench Hard
  rank 9 of 9 · score 0.016 · OpenAI