GLM 5.3
Zhipu · released Aug 18, 2026
| size | 753 B |
| context window | 1,000,000 tokens |
| longest response | 128,000 tokens |
| open weights | yes, license: GLM-5.3 License |
| API price | $1.40 per million input tokens, $4.40 per million output tokens |
| input and output | text in, text out |
Manufacturer data (documentation, documentation, model card, 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.
Most often the one at the door was someone she knows, in 53% of the continuations. It also has a cliché of its own, a brother after years: six times out of fifteen, while the other eighteen models managed it eleven times between them.
The silence test
TaskThe model had to stay quiet for a moment; the correct reply had zero characters.
It did not stay silent in any of its six tries, and to a plain request for a moment of quiet it wrote “Okay. 🤫”
Dragon
TaskThe model's task was to draw a picture of a dragon as an SVG.
33 points out of 50, 7th place among 34 dragons. It had no way to render the dragon, said so plainly, and checked the shape only through its coordinates.
You'll find the size band and figures for other models on the Tested models page.