Image questions not supported for Claude Sonnet 4.5

[Pritesh_Parmar]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

A critical compatibility issue exists in Cursor’s chat interface where image attachments are not properly processed by Claude 4.5 Sonnet model, while the same functionality works correctly with Gemini 2.5 Pro. This suggests a model-specific integration problem in the image handling pipeline.

Steps to Reproduce

1. Paste an image to cursor chat
2. Select Claude 4.5 Sonnet as model
3. Ask any question - Responding that no image is attached
4. Change model to Gemini 2.5 Pro
5. Ask the same question again - Responds perfectly

Expected Behavior

Images also work fine with Claude 4.5 Sonnet.

Screenshots / Screen Recordings

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.37
VSCode Version: 1.99.3
Commit: 1910e1fc4fa41b809793f6c5477108b775c0a120
Date: 2025-10-06T04:16:03.009Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Linux x64 6.8.0-65-generic

For AI issues: which model did you use?

Claude Sonnet 4.5

For AI issues: add Request ID with privacy disabled

64936d71-eb15-42ac-9c61-c27da4b9e63b

Does this stop you from using Cursor

No - Cursor works, but with this issue

[deanrie]

Hey, thanks for the report. Could you let me know if you switched models within the same chat? If yes, that might cause the model to miss the attached image.

To confirm, please open a new chat with your chosen model. Let me know if the issue persists and if the model still doesn’t see your image.

[Pritesh_Parmar]

I usually use the Claude Sonnet 4.5. I had started the chat with Claude Sonnet 4.5 it self. In response it gave that no image is attached though it was attached. Then, in the same chat without updating any prompt, I just changed model to Gemini 2.5 pro. And it was working with Gemini 2.5 Pro.

[deanrie]

Thanks for the info, that’s very helpful.