Cursor fails to connect to Opus 4.6 – Provider Error 57

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Provider Error when connecting to any Anthropic AI model. In particular, OPUS 4.6. Cursor shows: “We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.”

Error details:

  • Error code: 57
  • Request ID: c47001f9-0460-4e8b-a6e2-02156cbeb65f
  • isRetryable: false
  • Occurs when attempting to use Composer/Agent with Opus 4.6 (or selected model)

Interestingly, this is not happening with any other AI model - GPT 5.3, Gemini, Grok, etc. ONLY with Opus models. Additionally, all the other computers that I use, Cursor ( and my same account details), Opus 4.6 is functional. Only my home pc is showing this bug!

Steps to Reproduce

  1. Open Cursor IDE
  2. Open or start a Composer/Agent chat
  3. Send a message or run an agent task
  4. Provider Error (57) appears instead of a model response
  5. Error states connection to model provider failed

Expected Behavior

Cursor should connect to the selected AI model (e.g. Opus 4.6) and respond to messages. The model provider connection should succeed and return AI-generated responses.

Screenshots / Screen Recordings

Cursor not connecting to Opus 4.6.jpg
Cursor not connecting to Opus 4.6.jpg889×196 23.3 KB

Operating System

Windows 10/11

Version Information

Version: 2.4.37 (user setup)
VSCode Version: 1.105.1
Commit: 7b9c34466f5c119e93c3e654bb80fe9306b6cc70
Date: 2026-02-12T23:15:35.107Z
Build Type: Stable
Release Track: Early Access
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Opus 4.6

For AI issues: add Request ID with privacy disabled

Request ID: c47001f9-0460-4e8b-a6e2-02156cbeb65f
{“error”:57,“details”:{“title”:“Provider Error”,“detail”:“We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.”,“isRetryable”:false,“additionalInfo”:{},“buttons”:,“planChoices”:},“isExpected”:true}
Provider Error We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.
H4t: Provider Error We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment.
at hpf (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9097:38263)
at upf (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9097:37251)
at Epf (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9098:5088)
at Rva.run (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9098:9098)
at async Vyt.runAgentLoop (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34210:57104)
at async ggc.streamFromAgentBackend (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34259:7835)
at async ggc.getAgentStreamResponse (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34259:8576)
at async qTe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9180:14965)
at async Xi (vscode-file://vscode-app/c:/Users/ED-BuildersMegastore/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:33004:3808)

Additional Information

Please help. I spend over £2,000 per month on your platform. I have several projects I must finish, and I can not get them to work! I have uninstalled and reinstalled the Cursor app. Still not working. Please assist.

Does this stop you from using Cursor

Yes - Cursor is unusable

3

Hey, thanks for the report. This is a common issue we’ve recently seen with a few users. It’s usually caused by MCP server settings or third-party API key settings that interfere with connecting to Anthropic.

Since it only happens on this machine, it’s likely related to local Cursor config. Please try this:

  1. Cursor Settings > Tools & MCP: If you have any MCP servers connected (Perplexity, Figma, or custom), temporarily disable them all.
  2. Cursor Settings > Models: Make sure Override OpenAI Base URL is turned off. If you have any third-party API keys set (Anthropic or OpenAI), temporarily disable those too.
  3. Sign out and sign back in (Cursor Settings > Sign Out, then Sign In).
  4. Test in a new chat in a different project folder.

This helped several users with the exact same error:

If that doesn’t help, and since the issue is specific to this machine and only affects Anthropic models:

  • Go to Cursor Settings > Network > Run Diagnostics and share the results.
  • Try disabling HTTP/2: App Settings Ctrl + , search for HTTP/2, then enable Disable HTTP/2.
  • Check whether your firewall or antivirus on this PC is blocking any endpoints.

Let me know how it goes.

4

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