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| 1 models | Cl Anthropic Claude Fable 5 View → |
|---|---|
| Maker | Anthropic |
| Tier | Flagship |
| Status | Active |
| Context window | 1M ctx |
| Knowledge cutoff | Jan 1, 2026 |
| Released | Jun 9, 2026 |
| API string | claude-fable-5 |
| Note | First publicly available Mythos-class model (above Opus); Mythos 5 weights with safety classifiers active. 1M context, $10/$50, highest benchmarks of any GA model. Refusals return stop_reason refusal; mandatory 30-day retention. |