Zhipu AI · Rate Limits

Zhipu Ai Rate Limits

Z.ai applies model-specific concurrency to API users with prepaid balance. GLM Coding Plan subscribers have 5-hour and weekly usage windows with peak/off-peak quota multipliers.

3 Limits Throttle: 429
AILLMGLMRate LimitingQuotas

Limits

API Default Concurrency account
concurrent-requests
1
Default per-model concurrency for prepaid API users; varies by package.
GLM Coding Plan Window account
window
5-hour and weekly
Usage allowances reset on rolling 5-hour and weekly windows.
Peak Hours Multiplier account
quota-multiplier
2-3x
Peak (14:00-18:00 UTC+8) consumes quota at 2-3x the off-peak rate for GLM-5.1 / GLM-5-Turbo.

Policies

Backoff Strategy
Exponential backoff with jitter; honor Retry-After headers.
Concurrency Upgrade
Higher concurrency requires contacting Z.ai sales or upgrading plan tier.

Sources