Claude 4 is brilliant on website, it is developmentally disabled in Cursor IDE

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Why is claude 4 absolutely the best model for coding on https://claude.ai/, but when I am in cursor IDE, it is absolutely an idiot?

Steps to Reproduce

Go to https://claude.ai/ propose a complex modification within a complex codebase, get a roughly 70% success rate. Perform the same request from cursor IDE and you may as well be talking to an unplugged GPU hoping for an intelligent response. Are you saving money by some kind of degraded service fraud scheme?

Expected Behavior

What is meant to happen is for claude to code and perform architectural analysis intelligently as it does on claude.ai

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.38 (user setup)
VSCode Version: 1.99.3
Commit: 3fa438a81d579067162dd8767025b788454e6f90
Date: 2025-10-29T20:45:40.883Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.19045

For AI issues: which model did you use?

claude 4.0 thinking

Additional Information

There has been a long history of profiteering at any cost placing greed above all other considerations. I believe I can prove that you are doing something shady here. I dare you to test me on this

Does this stop you from using Cursor

No - Cursor works, but with this issue