GLM 5.3 replaces GLM 5.2 as the per-key add-on
Same base model, seven points higher on the Artificial Analysis index, where it ties Kimi K3 at the top of the open-weight board. The price and the per-key limits do not move, and the served context goes up: the whole 1M per request instead of 500K. It is text only, so the vision cases stay on Qwen3.6 and Gemma 4.
- Still €150 a month per API key
- 1M of context per request, up from 500K
- Same monthly allowance by tier: 2B, 6.5B and 18B tokens
- Z.ai’s own GLM-5.3 licence, not MIT