## Problem
Importing the client failed with `ImportError: cannot import name 'Mistral' from 'mistralai'` even though the package appeared installed. The reporter had installed `mistralai` with conda, which gave the old 0.x release, and then with pip, which gave 1.x, and was running the code inside a Jupyter notebook. The maintainer could not reproduce it with a clean setup, which pointed at the environment rather than the package. Restarting the Jupyter kernel so it picked up the pip-installed 1.x package made the import work.
## Verified fix
This import error almost always means your interpreter is loading a different `mistralai` than you think, commonly the old 0.x from conda when pip installed 1.x. Check which Python your notebook kernel uses with `sys.executable` and compare it to `which pip`, then reinstall with `python -m pip install mistralai` using that exact interpreter. Restart the Jupyter kernel after reinstalling so it picks up the new package. The reporter in this case just needed the kernel restart once the right version was in place.
Source: https://github.com/mistralai/client-python/issues/211