Anthropic releases Claude Fable 5.1
Anthropic releases Claude Fable 5.1 publicly on September 1, 2026, for long-horizon agentic coding, deep reasoning and multistep scientific research.
CL1 English report
MODEL
Claude Fable 5.1
- Release date:
- 2026-09-01
- Parameters:
- Undisclosed
- Input/output:
- Text + Image → Text
- Openness:
- Closed-source
- Organization:
- Anthropic
Official links | Chat | Code Plan | Agent tools | API |
|---|---|---|---|---|
| Global |
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