Why this limit matters
Z.ai: GLM 5.1 context window limit decides whether a key can enter a production route. TestKey reads model ID z-ai/glm-5.1, provider Zhipu AI (GLM), catalog context, real-key headers, 429 errors, and region signals together.
- Model: z-ai/glm-5.1
- Provider: Zhipu AI (GLM)
- Limit dimension: context window limit