Claude Fable 5.1
Most capable Claude: hardest reasoning and long-horizon work (slower, premium).
- Image input
- Reasoning
- Coding
- Tool calling
- Structured output
- Extended thinking
- Streaming
Specifications
| Provider | Anthropic |
|---|---|
| API model ID | claude-fable-5-1 |
| Released | September 2026 |
| Context window | 1,000,000 tokens |
| Max output | 128,000 tokens |
| Reasoning model | Yes |
| Price per 1M tokens (input / output) | $10 / $50 |
Specs as published by Anthropic. Prices are standard list prices before caching or batch discounts.
More Anthropic models
FAQ
- What is the context window of Claude Fable 5.1?
- Claude Fable 5.1 accepts up to 1,000,000 tokens of context and can return up to 128,000 output tokens per reply.
- When was Claude Fable 5.1 released?
- Anthropic released Claude Fable 5.1 in September 2026.
- How do I use Claude Fable 5.1?
- Add your Anthropic API key in DapperGPT, pick Claude Fable 5.1 in the model picker, and start chatting. You pay Anthropic directly for usage.