Hey, thanks for the report. I can see the error logs and screenshots. It’s the classic resource_exhausted pattern.
The fact that Claude works but all OpenAI models fail could point to a temporary capacity issue on the provider side, but first let’s rule out the most common local cause.
Can you check one thing: in Cursor Settings > Tools & MCP, do you have any MCP servers connected? If yes, try temporarily disabling all of them. In a few identical cases, that was the root cause:
- Trouble connecting to the model provider for all Anthropic and Open AI models
- Connection problems with various models despite clean network diagnostics and having tried to switch to HTTP/1.1
Also try:
- Log out and log back in (Cursor Settings > Log Out, then Log In)
- Start a new chat in a fresh project folder
I noticed you also posted in this thread: Composer 1.5 and Codex 5.3 show "Reconnecting" repeatedly, then a Provider Error and cannot connect to the model provider. The same steps apply there too.
If you don’t have any MCP servers and logging out and back in doesn’t help, let me know.