Grok API Rate Limit Error 429: How to Fix

A 429 Too Many Requests from the Grok API means you exceeded either a requests-per-minute or a tokens-per-minute ceiling for your team.

Read the response headers

Rate limit headers tell you which ceiling you hit and when it resets. Log them — guessing wastes hours.

Add exponential backoff

for attempt in range(5):
    r = call_grok()
    if r.status_code != 429:
        break
    time.sleep(2 ** attempt)

Never retry immediately in a tight loop; that extends the window you are limited for.

Reduce token pressure

• Trim system prompts and long chat history.
• Cap max_tokens to what you actually render.
• Batch low-priority jobs off peak.

Still limited with low traffic?

Check that a stale key is not shared across environments, and confirm the key is valid at all — see Grok API 401 errors and invalid API key. Widespread 429s across teams can also indicate capacity pressure; check the status page.