Claude Fable 5.1
For demanding reasoning, long-horizon agents, research, and document, spreadsheet, and slide work. Released 2026-09-01; distinct from verification-gated Mythos 5.1.
Listed as available by vendor
- Vendor
- Anthropic
- Modality
- textimagecode
- Directory associations
- 0
Sources and review scope
Official identity and task scope checked
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Checked:
Article updated:
- Claude Fable 5.1 overviewChecked: 2026-10-15
Directory matching names
These names match legacy directory records; they are not automatically official aliases or identical snapshots.
Claude Fable 5.1claude-fable-5-1
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