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Claude Fable 5
WithdrawnAnthropicFrontierProprietary
The public, guardrailed sibling of Mythos and Anthropic's most capable widely-released model, built for long-horizon agentic work. Launched June 9, 2026 across the Claude API, AWS, and Microsoft Foundry — then pulled three days later under a US government export-control directive barring access by foreign nationals.
Specifications
- License
- Proprietary
- Weights
- Not released
- Architecture
- unknown
- Parameters
- Undisclosed
- Context window
- — tokens
- Max output
- —
- Knowledge cutoff
- Nov 30, 2025
- Price (in / out, $/M)
- —
- Modalities
- TextVisionCode
Benchmarks
No benchmark scores recorded yet. Spotted some? Submit a correction.
Vendor-reported figures are claims until independently verified. See methodology.