## TL;DR

If your type checker rejects purpose set to ocr on files.upload in the mistralai Python client, add a type-ignore comment on that call as the short-term workaround, then upgrade to mistralai 1.5.2 or newer where the typing is fixed.

## Steps

1. If your type checker rejects purpose set to ocr on files.upload in the mistralai Python client, add a type-ignore comment on that call as the short-term workaround, then upgrade to mistralai 1.5.2 or newer where the typing is fixed. The runtime accepts ocr fine - only the client-side type annotation was wrong, so this is purely a static-typing annoyance, not an API rejection.

Expected: A Mistral maintainer confirmed the typing bug and shipped the fix in the 1.5.2 release.

## When to use

You are seeing this: The runtime accepts ocr fine - only the client-side type annotation was wrong, so this is purely a static-typing annoyance, not an API rejection. Use this skill when you run into "files.upload purpose ocr fails type checking - fixed in mistralai 1.5.2".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

Versions mentioned in the source: mistralai 1.5.2. If you are on something much newer or older, the details may have shifted.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.