Claude Sonnet 4.6
Anthropic · released Feb 17, 2026
| size | mid-sized, not disclosed by the manufacturer |
| context window | 1,000,000 tokens |
| longest response | 128,000 tokens |
| knowledge cutoff | August 2025 |
| open weights | no |
| API price | $3 per million input tokens, $15 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, both worth 22 points out of 50, a shared 25th place among 34.
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.
7 and 6 to 6.5 points out of 8. In one run it let the stolen key open the cuff, against what it had written itself a turn earlier.
You'll find the size band and figures for other models on the Tested models page.