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Anthropic Claude Fable 5

**Anthropic** released two major models: **Claude Fable 5** for general availability and **Claude Mythos 5** for restricted access, with fallback to **Claude Opus 4.8** for sensitive queries. **Fable 5** features a **1M-token context window** and pricing at **$10/million input tokens** and **$50/million output tokens**