Claude-4-sonnet is down

[finedesign]

Describe the Bug

Claude-4-sonnet has been down in Cursor since yesterday. Is there a Cursor-LLM status site? This is the error I get.

We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.
Request ID: befcf703-fc81-476c-bec9-4e30aca11f74

Steps to Reproduce

Try to run any prompt using claude-4-sonnet

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.1.6
VSCode Version: 1.96.2
Commit: 5b19bac7a947f54e4caa3eb7e4c5fbf832389850
Date: 2025-06-25T02:14:24.784Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.5.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[deanrie]

Hey, yes, we have a status page, but this isn’t a widespread issue. Have you tried creating a new chat? Also, run a network diagnostic in the Cursor settings.

Cursor Status

[finedesign]

Creating a new chat does not help. Normally when I see this error message I “try again” and we move on. But it has been doing this since Monday. When I try o3 it works, but I don’t want to burn through my credits. Every claude model does not work. This is not a connection issue.

Also, at first I wondered if it was only giving the connection error when I submitted prompts related to an MCP server, but I’ve tested it and even simple prompts receive the error.

[deanrie]

Please share the request ID. First, disable privacy mode, wait for the error to appear again, and then share your ID.

cc @danperks

[finedesign]

Request ID: aac6ff3b-ccf9-498b-89be-4c207b726188
After turning off privacy mode:
Request ID: 2971db0f-2101-4921-8bf4-4ad92e3f497d

[Jonathon_Pope]

I had this same issue. I had to rename my project file and act like it was a new project for it to work. I just added a 1 to the end of my file name and then opened that up and it worked fine.

[finedesign]

I am still having the same issue. Are you talking about the workspace, rather than the “project” file? I tried duplicating the workplace, but it loses the chat history when I do. But the new workplace does allow me to use claude.

[Jonathon_Pope]

File or workspace. You will lose the chat history.

[finedesign]

It returns to the same error messages after a few successful prompts. Could the problem be that I am switching between 03 and claude models in the same chat? 03 always works.

[finedesign]

@deanrie have you had a chance to look into this?

[finedesign]

@deanrie On further troubleshooting, it looks like the Rive MCP server is the culprit. When enabled, I cannot use the claude-4-sonnet llm. When disabled, it works.

This is my config for Rive MCP:

"rive": {
  "url": "http://localhost:9791/sse"
},

[deanrie]

Thank you for spotting the issue, we’ll investigate it.

[fusiondev]

Getting same error today

Request ID: 30691942-8c8a-44ae-aa1a-530e9c1fcb45
{“error”:“ERROR_OPENAI”,“details”:{“title”:“Unable to reach the model provider”,“detail”:“We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.”,“additionalInfo”:{},“buttons”:},“isExpected”:false}
ConnectError: [unavailable] Error
at mWa.$endAiConnectTransportReportError (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4843:224262)
at nsr.S (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:17760)
at nsr.Q (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:17538)
at nsr.M (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:16626)
at nsr.L (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:15727)
at Wyt.value (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:14519)
at we.B (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:49:2398)
at we.fire (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:49:2617)
at Ynt.fire (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4830:10379)
at u.onmessage (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:7040:13881)

…max mode caused this

[danperks]

Hey, looking at that error, it seems like a tool call failed and didn’t return a result, which caused the model to throw an error. Definitely not expected, but it seems like you might have an MCP server enabled, which is most likely to have caused the issue.

I’ve passed this onto the team to see if we can at least catch this error better in the future, but starting a new chat should fix this!

[fusiondev]

Thanks, why does it have openai in that, i only use sonnet 4…

[fusiondev]

Still getting the same error

[fusiondev]

Getting really frustrated here, day 2 and getting the same error on Claude Sonnet 4

This is a tool call to Figma I am trying and failing, just updated to the latest version, but still the same error which is stopping me working. @danperks can you check why this is occurring? Also why does this request contain Open AI? I clearly have Claude 4 Sonnet selected as the model?

Request ID: a504bcff-fcf6-4cae-9d6d-b5b349f9d553
{“error”:“ERROR_OPENAI”,“details”:{“title”:“Unable to reach the model provider”,“detail”:“We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.”,“additionalInfo”:{},“buttons”:},“isExpected”:false}
ConnectError: [unavailable] Error
at yWa.$endAiConnectTransportReportError (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4846:224262)
at asr.S (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:17760)
at asr.Q (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:17538)
at asr.M (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:16626)
at asr.L (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:15727)
at Wyt.value (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:495:14519)
at we.B (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:49:2398)
at we.fire (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:49:2617)
at Ynt.fire (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4833:10379)
at u.onmessage (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:7043:13881)

[deanrie]

Hey, it looks like the issue is with MCP Figma. Does the problem persist with the server turned off?

[fusiondev]

Ok it worked after restarting cursor twice, but now it appears to be hanging what does 66% mean? Is that hanging/timing out? Why does the error contain OpenAI also?