Pyyan / Compare / GPT-6 Astra vs GPT-5.6 Sol
GPT-6 Astra vs GPT-5.6 Sol
2 of 5Language Models · verified 5 Sept 2026
GPT-6 AstraOpenAIcurrentGPT-5.6 SolOpenAIcurrent| Specification | GPT-6 Astra | GPT-5.6 Sol |
|---|---|---|
| Summary | Saturates three of the benchmarks it reports, and ships disabled for enterprise. | Flagship tier of the GPT-5.6 family. |
| Context | 1.05M | 1M+ |
| Input ($/Mtok) | $10 | — |
| Output ($/Mtok) | $50 | — |
| Licence | Proprietary | Proprietary |
| Max output | 128K | — |
| Parameters | Not published | — |
| Released | 3 Sep 2026 | 9 Jul 2026 |
| Model ID | gpt-6-astra | — |
| Category | Language Models | Language Models |
| Official | — | OpenAI ↗ |
Highlighted rows are where these differ.
GPT-6 Astra
- 97.6% on FrontierMath Tier 4, 99.9% on ARC-AGI-3 and 100% on ExploitBench
- Above 272K input tokens the whole request reprices: input and cache at 2x, output at 1.5x
- Rolls out to OpenAI's Daybreak cyber programme first, and arrives switched off for enterprise
Best for hard reasoning and computer use.
GPT-5.6 Sol
- Three tiers: Sol, Terra, Luna
- Adjustable reasoning effort from none to max
- Broad rollout began 9 July 2026
Best for all-round work.