Mistral API 429 Rate Limit Exceeded Error

How to fix it

Try these in order — the most common fix is first.

1. 1. Back off and respect Retry-After

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   1. Catch the 429 in your client
   2. Wait for the Retry-After header value, then retry with exponential backoff and jitter
   3. Lower concurrency or queue requests on your side
   Did this fix it? Yes No

2. 2. Check your limits and tier

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   1. Open the Limits page in the Admin panel
   2. Compare requests per second, tokens per minute and tokens per month against your usage
   3. Confirm you use a pay-as-you-go API key from the console, not a plan key
   Did this fix it? Yes No

3. 3. Raise your tier

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   1. Enable pay-as-you-go in Subscriptions to reach Tier 1
   2. Tiers upgrade automatically by cumulative billed amount: Tier 2 over $20, Tier 3 over $100, Tier 4 over $500
   3. Prepaying credits does not raise limits, only billed usage does
   4. Above $2,000 billed, contact support with your target requests per second, model and tokens per minute and month
   Did this fix it? Yes No

4. 4. Use batch processing for bulk jobs

   1. Send non-urgent bulk work through the Batch API, which is 50% cheaper per the pricing page
   Did this fix it? Yes No

Symptoms

API calls return HTTP 429 Too Many Requests (type rate_limit_error), often in bursts or right after switching to a new model.

Why it happens

• Free mode (the default) has the lowest limits
• Too many concurrent requests (requests per second)
• Tokens per minute or tokens per month cap reached
• Limits are set per organization and per model, so a new model can have different limits
• Using a Vibe plan key instead of a pay-as-you-go key

This guide also covers

• mistral api 429
• mistral rate limit exceeded
• mistral api too many requests
• mistral rate limit increase

The same problem in other apps

All plan limits, paywalls & watermarks guides →

• Claude Usage Limit Reached (Anthropic Claude)
• Perplexity Pro Limit Reached: Why It Happens (Perplexity)

Other Mistral AI errors

• Mistral API 401 Unauthorized: API Key Not Working
• Mistral API 402 Payment Required Error
• Mistral API 403 Forbidden Error
• Mistral API 500, 502, 503 and 504 Errors
• Mistral Model Deprecated or 404 Model Not Found
• Le Chat Not Working: Something Went Wrong
• Le Chat Message Limit Reached (Free and Pro)
• Le Chat File Upload Failed or Document Upload Limit