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Kimi API enforces rate limits on request frequency and concurrency to ensure platform stability and fair usage. Rate limit tiers are based on your account's cumulative top-up amount.

Rate limit tiers

API rate limits are tiered based on your account's cumulative top-up amount — the more you've topped up, the higher your available rate limits. For specific tier thresholds and corresponding RPM (requests per minute) and TPM (tokens per minute) limits, refer to the platform.moonshot.ai console.

How to check current limits？

  • Log in to the API console to view your current rate limit tier.
  • API response headers also include rate limit information:
    • X-RateLimit-Limit: Current rate limit cap
    • X-RateLimit-Remaining: Remaining available requests
    • X-RateLimit-Reset: Time when the limit resets

Handle 429 errors

When your request frequency exceeds the limit, the API returns a 429 status code. Recommended actions:

  1. Implement exponential backoff: Wait 1 second initially, then double the wait time with each retry (2s, 4s, 8s…).
  2. Control concurrency: Use request queues or semaphores to limit the number of simultaneous requests.
  3. Batch requests: Combine multiple small requests into fewer, larger ones.

Request higher rate limits

If your business needs exceed the current rate limits:

  • Top up to upgrade: Increase your cumulative top-up amount and the system will automatically upgrade your rate limit tier.
  • Contact sales: For special requirements, reach out to the platform sales team via platform.moonshot.ai/contact-sales to request a custom rate quota.
Rate limits - Kimi Help Center