Issue: Model output corrupted / no first token received

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

  • Occurs even with simple input like “hello”
  • Happens on 2 different PCs
  • Same issue on mobile hotspot
  • Network diagnostics passed
  • Clean environment tested
  • Model switching did not fix

Logs:

  • [composer] No first token received within 2s
  • Strange output with tokens like

This seems like a streaming or account/session issue.

Steps to Reproduce

  • Occurs even with simple input like “hello”
  • Happens on 2 different PCs
  • Same issue on mobile hotspot
  • Network diagnostics passed
  • Clean environment tested
  • Model switching did not fix

Logs:

  • [composer] No first token received within 2s
  • Strange output with tokens like

This seems like a streaming or account/session issue.

Operating System

Windows 10/11

Version Information

Version: 2.6.19 (user setup)
VSCode Version: 1.105.1
Commit: 224838f96445be37e3db643a163a817c15b36060
Date: 2026-03-12T04:07:27.435Z
Build Type: Stable
Release Track: Default
Electron: 39.4.0
Chromium: 142.0.7444.265
Node.js: 22.22.0
V8: 14.2.231.22-electron.0
OS: Windows_NT arm64 10.0.26200

Does this stop you from using Cursor

No - Cursor works, but with this issue

4

Hey, this is a known issue with Auto mode right now. A few users hit the same thing today. The root cause is that one of the models Auto routes to is returning invalid output. That’s why you’re seeing No first token received.

Workaround: instead of Auto, pick a specific model manually, like Claude 3.5 Sonnet or GPT-4. Those models are working fine.

The team is aware. Let me know if the workaround doesn’t help.

5

A post was merged into an existing topic: Why does Cursor Auto mode display garbled text?