Claude Fable 5.1
Premium model for long-running agentic workflows, refactors and visual front-end work.
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows and knowledge work: long code refactors, front-end and visual design, and document-heavy tasks.
- Provider
- Anthropic
- Type
- Language model
- Released
- Sep 1, 2026
- Context window
- 1M tokens
- Max output
- 128K tokens
- Price
- $10.00 input / $50.00 output per 1M tokens
- Input
- text, image, file
- Output
- text
- Open weights
- No
Best for
- Agents
- Coding
- Research
- Writing
- Enterprise
Strengths
- Long-running autonomous work
- Front-end & visual design
- Knowledge work
More from Anthropic
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- Claude Haiku 5.5 — Anthropic. Small, fast and inexpensive — built for subagents, summarization and browser use.
- Claude Opus 5 — Anthropic. Previous-generation Opus; still a strong reasoning and coding model.