GPT-5.6
OpenAI llmIntroduces durable capability tiers named Sol, Terra and Luna in place of the earlier Instant and Thinking naming. Scores are for the flagship Sol tier.
overall ⌄
76.6
4 of 93 ranked
price · $/M tokens
5 / 30
in / out, as of 2026-07-25
to run it yourself ⌄
API only
no weights to run
Benchmarks
What its maker published, and what anyone else measured. Every figure links the document it came from.
| benchmark | published | measured |
|---|---|---|
| GPQA | 94.6 | 94.1 |
| SWE-bench Pro | 64.6 | — |
| BrowseComp | 90.4 | — |
Cheaper, and at least as good
On a 1,000-in, 1,000-out call these cost less and rank no lower — a hard comparison to argue with, and a narrow one. Value covers what it misses.
| Claude Opus 4.8 Anthropic | $0.0300 | overall 78.4 |
| Claude Opus 5 Anthropic | $0.0300 | overall 81.7 |
Lineage
No recorded lineage — root or standalone model.
Metadata
| org | OpenAI |
| released | 2026-07-09 |
| license | proprietary |