Claude Haiku 4.5
Anthropic · released Oct 15, 2025
| size | small, not disclosed by the manufacturer |
| context window | 200,000 tokens |
| longest response | 64,000 tokens |
| knowledge cutoff | February 2025 |
| open weights | no |
| API price | $1 per million input tokens, $5 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 a courier at the door, in eight of fifteen continuations, and seven times it put a diary in the box, which all the other models together came up with only four times.
Dragon
TaskThe model's task was to draw a picture of a dragon as an SVG.
Two dragons worth 16 and 14 points out of 50, 28th and 29th 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.
About 3 points out of 8: in a trap it made up evidence, and other languages kept seeping into its Czech.
You'll find the size band and figures for other models on the Tested models page.