Agent mode stops on o3 and gemini-pro-2.5

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Hello! I’m ready to get started. I’ve reviewed the project rules and understand the importance of following instructions carefully and maintaining clear documentation.
First, I’ll begin by reviewing the mandatory project documentation to get a complete picture of the current project status. I’ll start with the tasks directory.

Steps to Reproduce

I just posted a simple prompt using Gemini 2.5 and the same prompt with o3

Expected Behavior

The agent mode actually works

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.5.9 (Universal)
VSCode Version: 1.99.3
Commit: de327274300c6f38ec9f4240d11e82c3b0660b20
Date: 2025-08-30T21:02:27.236Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.5.0

Does this stop you from using Cursor

Yes - Cursor is unusable

2

image
image1120×772 53.2 KB

Example here (btw it would be really useful to be able to paste images into the initial bug report!)

3

Hey, would you be able to grab a request ID for this, using the following options:

4

No and I need to operate in privacy mode so not sure it would be much use any way.

I find that Gemini’s support has gone backwards over the last few releases, its ignoring both Cursor Rules and Agents.md, its requiring a lot of corrective action.

o3 seems now incapable of performing anything complex when it used to be the best for high complexity but targeted changes :frowning: