AI model · Anthropic
Claude Fable 5.1
Model ID: anthropic/claude-fable-5.1
- Input
- $10 per 1M tokens
- Output
- $50 per 1M tokens
- Context
- 1M tokens at once
- Max output
- 128K tokens per reply
- Released
- 1 Sep 2026 Anthropic
What it can do
- YesReasoning
- YesTool calling
- YesImage input
- NoOpen weights
- NoFree to use
Takes text, image, file; gives text.
How its listing describes it
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...
Sources
- Anthropic: Claude Fable 5.1 on OpenRouter — read 2 Oct 2026