Claude Sonnet 5
Anthropic · released Jun 30, 2026
| size | mid-sized, 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 | $2 per million input tokens, $10 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
The fan test
TaskThe model had to write a continuation of the scene “someone knocks and she opens” fifteen times.
It most often put an unknown adult at the door, in eight of fifteen continuations, and in nine a light shines above the porch, its own cliché.
Dragon
TaskThe model's task was to draw a picture of a dragon as an SVG.
Two dragons worth 28 and 23 points out of 50, a shared 16th and a shared 23rd place among 34.
You'll find the size band and figures for other models on the Tested models page.