1.7.11: Wrong model being executed?

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Open new tab with Opus 4.1, and it reports it’s 3.5 sonnet… Hopefully not being billed for opus on sonnet executions!

Steps to Reproduce

Ask the model who it is.

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.11
VSCode Version: 1.99.3
Commit: 867f14c797c14c23a187097ea179bc97d215a7c0
Date: 2025-09-26T16:55:04.318Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

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3

Hey, thanks for your 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 have no knowledge of themselves.

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

5

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