Pyyan / Compare / Claude Opus 4.5 vs GPT-5.6 Sol
Claude Opus 4.5 vs GPT-5.6 Sol
2 of 5Language Models · verified 13 Aug 2026
Claude Opus 4.5Anthropicdeprecated
GPT-5.6 SolOpenAIcurrent| Specification | Claude Opus 4.5 | GPT-5.6 Sol |
|---|---|---|
| Summary | Legacy Opus, still callable. | Flagship tier of the GPT-5.6 family. |
| Context | — | 1M+ |
| Licence | Proprietary | Proprietary |
| Released | — | 9 Jul 2026 |
| Model ID | claude-opus-4-5 | — |
| Category | Language Models | Language Models |
| Official | Anthropic ↗ | OpenAI ↗ |
Highlighted rows are where these differ.
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.