OpenAI model access issue in IDE

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Couldn’t access openai models for 4 hours now. other models are working fine

Request ID: 89163d57-e437-42c3-a770-535f4b35d149

{“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”:,“planChoices”:},“isExpected”:false}

ConnectError: [unavailable] Error
at Fqc.$endAiConnectTransportReportError (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4984:399337)
at uwo._doInvokeHandler (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:490:36007)
at uwo._invokeHandler (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:490:35749)
at uwo._receiveRequest (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:490:34514)
at uwo._receiveOneMessage (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:490:33336)
at qDt.value (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:490:31429)
at _e._deliver (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:49:2962)
at _e.fire (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:49:3283)
at hgt.fire (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4969:12156)
at MessagePort. (vscode-file://vscode-app/c:/Users/Acer/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7492:18403)

Steps to Reproduce

Select any openai model and run something in agent or ask mode

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.54 (user setup)
VSCode Version: 1.99.3
Commit: 7a31bffd467aa2d9adfda69076eb924e9062cb20
Date: 2025-11-03T22:40:44.657Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.22631

For AI issues: which model did you use?

openai

For AI issues: add Request ID with privacy disabled

89163d57-e437-42c3-a770-535f4b35d149

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the report. It looks like a connection issue with the OpenAI provider. Let’s try a few diagnostic steps:

  1. Run network diagnostics:
    Open Cursor → Settings → Network → “Run Diagnostics”
    Share the results here

  2. Disable HTTP/2 (often helps on corporate networks/VPNs):
    Press Ctrl + , to open settings
    Type “HTTP/2” in the search
    Enable “Disable HTTP/2”
    Restart Cursor

  3. Check in a new chat:
    Create a new Agent/Chat and try again

Also let us know if you’re using a VPN, firewall, or a corporate network. These can sometimes block connections to OpenAI.

Please share the diagnostics results and whether disabling HTTP/2 helped.

3

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image731×986 25.3 KB

thank you for responding

this is what i am getting in network windows.. but with having this also i can get result from codex.. but no other gpt model works

in codex also i get intterupted quickly with same issues.. but somehow it gives answers..

but other gpt models dont give any answers just give the error

also other models are not affected composer, claude models are runnnig fine ( these not my primary models, so they might also have the issue eventhough i am not using it)

also i tried this in MAC too.. chat, agent get this issue time to time..

and i tried in a another windows machine i also got interrupted a bit but not this much. ( its a machine given by uni in Latvia, i am currently in Sri Lanka)

thank you in advance

4

Thanks for the diagnostics! The issue is clear now:

Your network checks show that a proxy in your network is buffering streaming responses - this is preventing Chat and Agent from working properly. The high ping (3 170 ms) also points to network interference.

How to fix it:

Identify your proxy/network setup:

  • Are you on a corporate network or VPN?
  • Do you have firewall/antivirus software running?
  • Some ISPs also buffer connections

Try these steps:

  • Temporarily disable VPN and test
  • Whitelist Cursor domains in your firewall/proxy: *.cursor.com, *.cursor.sh
  • Configure proxy exceptions for Cursor in your network settings
  • If you’re on a corporate network, ask IT to allow streaming connections for Cursor

Quick test: try Cursor on a different network (mobile hotspot) to confirm it’s network-related.

The fact that Claude works while OpenAI models fail suggests your proxy is selectively blocking OpenAI endpoints. Tell us what network environment you’re on so we can give more specific guidance.