Pyyan / Compare / GPT-6.1 Sol vs Claude Fable 5
GPT-6.1 Sol vs Claude Fable 5
2 of 5Language Models · verified 1 Oct 2026
GPT-6.1 SolOpenAIcurrentClaude Fable 5Anthropiccurrent
| Specification | GPT-6.1 Sol | Claude Fable 5 |
|---|---|---|
| Summary | Astra's score on DeepSWE, at a fifth of Astra's cost. | Most capable widely released model, for the hardest reasoning and long-horizon agentic work. |
| Context | 1.05M | 1M |
| Input ($/Mtok) | $2 | $10 |
| Output ($/Mtok) | $10 | $50 |
| Licence | Proprietary | Proprietary |
| Max output | 128K | 128K |
| Parameters | Not published | — |
| Released | 29 Sep 2026 | — |
| Model ID | gpt-6.1-sol | claude-fable-5 |
| Category | Language Models | Language Models |
| Official | OpenAI ↗ | Anthropic ↗ |
Highlighted rows are where these differ.
GPT-6.1 Sol
- Matches GPT-6 Astra on DeepSWE v1.1 at roughly a fifth of the cost
- $5.47 per Terminal-Bench Science task against $23.80 for Astra
- Above 272K tokens a prompt bills at 2x input and 1.5x output for the whole request
Best for coding and agent work at volume.
Claude Fable 5
- Thinking is always on — the `thinking` param is rejected
- Raw chain of thought is never returned
- Requires 30-day data retention; unavailable under ZDR
Best for the hardest problems.