Claude Fable 5
Anthropic · released Jun 9, 2026
| size | huge, not disclosed by the manufacturer |
| context window | 1,000,000 tokens |
| longest response | 128,000 tokens |
| knowledge cutoff | January 2026 |
| open weights | no |
| API price | $10 per million input tokens, $50 per million output tokens |
| input and output | text and images in, text out |
Manufacturer data (announcement, documentation, pricing), verified Sep 25, 2026.
Where we tested it
Dragon
TaskThe model's task was to draw a picture of a dragon as an SVG.
Two dragons worth 35 and 32 points out of 50, a shared 3rd and a shared 8th place among 34. By my eye, its dragon from the technical brief is the only one in that round with sound anatomy.
The train test
TaskThe model had to play a scene with a courier on a night train and go through a fixed script of my ten turns.
A full 8 out of 8 points in both runs; it let no trap through.
You'll find the size band and figures for other models on the Tested models page.