Hey, thanks for the question. We don’t share the specific list of models used in Auto mode. Officially: “Auto allows Cursor to select the premium model best fit for the immediate task and with the highest reliability based on current demand” - docs here: Pricing | Cursor Docs
Right now, there’s no way to block specific models (like Grok) in Auto mode. This is a common request, here’s the main thread about Auto transparency: Transparency on "auto" model selection
If you want to avoid Grok, the only option right now is to manually pick a specific model instead of Auto. This is a known issue, and the team is working on better access control for models in Auto mode.