Anthropic: Claude Fable 5
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
Everything else
| Max output | 128K |
|---|---|
| Input / 1M | $10 |
| Output / 1M | $50 |
| Cache read / 1M | $1 |
| Cache write / 1M | $12.50 |
| 1M in + 1M out | $60 |
| Takes | text, image, file |
| Returns | text |
| Tools | yes |
| Reasoning | always on · max, xhigh, high, medium, low |
| Open weights | no |
| Released | 2026-06-09 |
| Knowledge cutoff | — |
| Retires | — |
| Catalog id | anthropic/claude-fable-5 |
Benchmarks
| source | epoch |
|---|---|
| eci | 160.73 |
| confidence | Confident |
| accessibility | API access |
| aime | 0.997 |
| aimeStderr | 0.0028 |
| simpleQA | 0.683 |
| simpleQAStderr | 0.0147 |
Benchmark scores by Epoch AI, CC BY 4.0.
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.