What causes "Mistral Model Deprecated or 404 Model Not Found"?

Model reached its retirement date Typo in the model ID Hardcoded dated model names instead of tracking the deprecation table

How do I fix "Mistral Model Deprecated or 404 Model Not Found"?

1. Look up the model in the deprecation table: Open the models overview in docs.mistral.ai Find your model under Deprecated and retired models Note the retirement date and listed alternative (for example Mistral Small 3.2 retires 7/31/2026, replaced by Mistral Small 4; Mistral Medium 3.1 retires 8/31/2026, replaced by Mistral Medium 3.5) 2. Switch and test: Change the model ID to the replacement Re-run your prompts, since output style and limits can differ Check the Limits page, because limits are per model 3. Verify the ID: Use the list models endpoint to confirm the exact ID

Mistral Model Deprecated or 404 Model Not Found

Workaround available API Updated November 14, 2026Based on 2 user reportsHow we research

Quick answer

Mistral retires older models on a schedule and lists replacements on its models page. If a call 404s on a model ID, check the Deprecated and retired models table and switch to the named replacement.

Most likely fix: Look up the model in the deprecation table

How to fix it

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

1. Look up the model in the deprecation table
1. Open the models overview in docs.mistral.ai
2. Find your model under Deprecated and retired models
3. Note the retirement date and listed alternative (for example Mistral Small 3.2 retires 7/31/2026, replaced by Mistral Small 4; Mistral Medium 3.1 retires 8/31/2026, replaced by Mistral Medium 3.5)
Did this fix it?
2. Switch and test
1. Change the model ID to the replacement
2. Re-run your prompts, since output style and limits can differ
3. Check the Limits page, because limits are per model
Did this fix it?
3. Verify the ID
1. Use the list models endpoint to confirm the exact ID
Did this fix it?