Custom model auto rename problem

Support Bug Reports
,
1

When I try to switch to a custom model named “claude-opus-4-6“ which is provided by a third party provider through OpenAI API Key, it is forced to switch to cursor official model named “claude-4.6-opus-high“ and thus cannot be recognized by the provider.

image
image2099×1340 214 KB

1 Like
2

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

To help us investigate and fix this faster, could you edit your original post to include the details from the template below?

Bug Report Template - Click to expand

Where does the bug appear (feature/product)?

  • Cursor IDE
  • Cursor CLI
  • Background Agent (GitHub, Slack, Web, Linear)
  • BugBot
  • Somewhere else…

Describe the Bug
A clear and concise description of what the bug is.

Steps to Reproduce
How can you reproduce this bug? We have a much better chance at fixing issues if we can reproduce them!

  1. …
  2. …
  3. …

Expected Behavior
What is meant to happen here that isn’t working correctly?

Screenshots / Screen Recordings
If applicable, attach images or videos (.jpg, .png, .gif, .mp4, .mov)

Operating System

  • Windows 10/11
  • MacOS
  • Linux

Version Information

  • For Cursor IDE: Menu → About Cursor → Copy
  • For Cursor CLI: Run agent about in your terminal
IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)

For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…

Additional Information
Add any other context about the problem here.

Does this stop you from using Cursor?

  • Yes - Cursor is unusable
  • Sometimes - I can sometimes use Cursor
  • No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!

4

Hey, thanks for the report. I can see the issue in the screenshot. Cursor is automatically mapping your custom model name claude-opus-4-6 to the official claude-4.6-opus-high, and then your third-party provider rejects it.

This looks like a bug. Cursor’s model alias resolution is being applied incorrectly to BYOK custom models. I’ve shared this with the team.

Can you also share your Cursor version Menu -> About Cursor -> Copy? That’ll help with the investigation.

Let me know if the workaround helped.

5

Version: 2.6.19 (user setup)
VSCode Version: 1.105.1
Commit: 224838f96445be37e3db643a163a817c15b36060
Date: 2026-03-12T04:07:27.435Z
Build Type: Stable
Release Track: Default
Electron: 39.4.0
Chromium: 142.0.7444.265
Node.js: 22.22.0
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.19045

6

ok here is the version info

7

Same problem.

If a custom model’s name match one of the models cursor already has, it appends something like “-medium”, “-high” to the model name, causing the provider to raise a model not found error.

Version: 2.6.19 (system setup)
VSCode Version: 1.105.1
Commit: 224838f96445be37e3db643a163a817c15b36060
Date: 2026-03-12T04:07:27.435Z
Build Type: Stable
Release Track: Default
Electron: 39.4.0
Chromium: 142.0.7444.265
Node.js: 22.22.0
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.26200
8

This topic was automatically closed 22 days after the last reply. New replies are no longer allowed.