Paid for Claude 4.5 thinking, cursor give me Claude 3.5

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Cursor is lying users about what they provide

Steps to Reproduce

Choice PLAN mode, choice Claude 4.5 thinking with MAX mode. Then ask “what is your official internal model name or ID?”

Expected Behavior

I paid for Claude 4.5 and i want to use Claude 4.5 not Claude 3.5

Screenshots / Screen Recordings

image.png
image.png2560×1440 104 KB

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.43
VSCode Version: 1.99.3
Commit: 8e4da76ad196925accaa169efcae28c45454cce0
Date: 2025-10-30T18:49:27.589Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Linux x64 6.17.5-arch1-1

For AI issues: which model did you use?

Claude 4.5 thinking MAX

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the report.

When you select a specific model, the request is always processed by that model without switching. So if you choose Claude 4 Sonnet, the response will come from that exact model.

Important: all Anthropic models are named “Claude,” and Claude 4 was trained on data that included information about Claude 3.5 Sonnet. Also, models accessed via API without a system prompt don’t have knowledge of themselves.

I’ve tested this multiple times, and the results are consistent.

Important note: According to Anthropic’s release notes, the model identifier claude-3-5-sonnet-20241022 that you’re seeing in the response is no longer available. This further confirms that the self-identification response is unreliable and outdated.

1 Like