GLM-5.1 API Pricing — $0.60/M input, $2.20/M output
Previous-generation GLM flagship: strong agentic and reasoning performance at a lower price.
Legacy — superseded by GLM-5.2 See GLM-5.2 pricing.
No announced shutdown date. Source · Full retirement tracker
Speed
Not yet measured — see the speed benchmark leaderboard for models we do track.
Cost at scale
| Tokens / month | Est. cost (blended 3:1) |
|---|---|
| 100,000 | $0.10 |
| 1,000,000 | $1.00 |
| 10,000,000 | $10.00 |
| 100,000,000 | $100.00 |
How GLM-5.1 compares
Head-to-head comparisons
FAQ
Is GLM-5.1 cheaper than Qwen 3.7 Plus?
GLM-5.1 costs $1.00/M blended tokens, Qwen 3.7 Plus costs $1.10/M — GLM-5.1 is cheaper.
How much does 1 million tokens cost with GLM-5.1?
At a 3:1 input:output ratio, 1 million blended tokens costs approximately $1.00. Pure input costs $0.60/M; pure output costs $2.20/M.
Who provides GLM-5.1?
GLM-5.1 is served by Z.ai. Pricing was last verified on 2026-06-19 against https://z.ai/model-api.