Cursor switchs to "Auto" instead of using the designated model

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Background Agent (GitHub, Slack, Web, Linear)

Describe the Bug

I build a plan with a model eg. Gemini-3-pro.
When i click build plan, the model automatically switches to “Auto”.
It happens way to often to be a mistake. this happens in the latest version.

It’s really a violation of users’ trust. If I want to use a model then use that model, give me an error but don’t bloody switch the model because you want it so.
Perhaps there should be a setting that prevents automatic model switches.
If I want to run with “Auto” I’ll chose that option myself.
No wonder the code produced was rubbish.

Steps to Reproduce

Create a plan with Gemini and then try to “Build” it. The agent starts with “Auto” model.

Expected Behavior

The agent should be locked with the user designated model. If there’s a problem i expect an error not an automatic switch to “Auto”!

Operating System

MacOS

Version Information

Version: 2.4.30
VSCode Version: 1.105.1
Commit: 0f8217a84adf66daf250228a3ebf0da631d3c9b0
Date: 2026-02-06T23:20:57.191Z
Build Type: Stable
Release Track: Early Access
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 25.1.0

For AI issues: which model did you use?

“Gemini-3-pro-preview”, “Sonnet-4.6”

Additional Information

Don’t switch to “Auto” unless the user explicitly selected “Auto”. Who uses auto anyhow?

Does this stop you from using Cursor

Yes - Cursor is unusable

2 Likes
3

Hey, thanks for the report. This is a known issue. The model can actually switch back to Auto when building a plan.

So the team can check if this is the same bug or a regression, can you share the Request ID? You can find it in the chat context menu (three dots in the top right) > Copy Request ID.

Workaround: After you pick a model and click “Build plan”, double-check the model selector before the agent starts. If it switched to Auto, change it back manually.

A similar issue is described here: To-dos Selected Build in New Agent Not Using Selected Model to Build this Plan. They found that “Build in New Agent” uses the model from the last agent you ran, not the one selected in the plan. You might be seeing something similar.

Let me know if you find any pattern, like whether it happens every time or only in certain scenarios.

5

It’s possibly the same issue.
However the model for Build goes to “Auto” in my case. It happened in the latest version. This is super annoying. Indeed it can be fixed manually if you don’t get carried away. Clicky clicky.

Hope it gets fixed soon.
RequestID: 697302a6-e5a9-4232-9892-da5ef59e9ea4

1 Like
7

If this continues I might cancel my Cursor subscription, I keep getting dumb unusable results. I should have an option to never EVER use auto.