Claude Opus 4.5 keeps hanging in agent mode

Support Bug Reports
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Hey, thanks for the report. I saw a very similar case recently: the agent freezes when using MCP tools and editing files. In that case, the issue was network-related (a VPN + HTTP/2 conflict).

Try this workaround:

  1. Add this to settings.json:
    "cursor.general.disableHttp2": true
  2. If you’re using a VPN or a corporate network, try without it
  3. Restart Cursor

For debugging, we need a bit more info:

  • Next time it freezes, copy the Request ID (chat menu on the right > Copy Request ID)
  • Cursor Settings > Network > Run Diagnostics, please share a screenshot of the results
  • Help > Toggle Developer Tools > Console, if you see any red errors when it freezes, please screenshot them

One more question: does this happen only with Opus 4.5, or with other models too?

Related: Frequent Agent Freezing During Tool-Based Responses