Z.AI
GLM 5.3 Fast
Flagship GLM model for long-horizon coding, agents, and complex project delivery
Model facts
- Context window
- 1.05M tokens
- Maximum output
- 262K tokens
- Cheapest paid input
- $2.1 per 1M tokens
- Cheapest paid output
- $6.6 per 1M tokens
- Open weights
- yes
- Providers
- 1
Capabilities and modalities
reasoning, tool calling, structured output, temperature control, open weights, text.
Observed price history
- 2026-09-03: $2.1 input / $6.6 output per 1M tokens
API providers
- Vercel AI Gateway — model id zai/glm-5.3-fast; $2.1 input / $6.6 output per 1M tokens; provider documentation