Anthropic · Model release
Claude Fable 5.1 released
A new Claude Fable release with a 1M-token context window and 128K maximum output.
- Occurrence
- Occurrence date basis
- Provider publication date
- Status recorded with this event
- available
- Event checked
Original sources
- Claude Fable 5.1 - Claude Platform Docs (opens in a new tab) ↗
First-party source · Source checked
Claude Fable 5.1 This model 1M 128K $10 / $50 Slower Adaptive (always on) high Jun 2026 ... Released September 1, 2026 Retirement Not sooner than September 1, 2027
Recording provenance
First recorded by StackReplay . This is a discovery date, not the occurrence date.
Event ID: claude-fable-5-1-released