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[BUG] openai/gpt-5.2-codex Error message: JSON Parse error: Unterminated string errors #10755
Closed as not planned
Description
Description
During session the agent would output a lengthy error ending with Error message: JSON Parse error: Unterminated string
From share link, this item has the entire error message. Also attached the session.json to issue.
Plugins
No response
OpenCode version
1.1.36
Steps to reproduce
- Use
opencode - Have
openai/gpt-5.2-codexas your model - Use normally to plan+build
- Randomly dumping the
Error message: JSON Parse error: Unterminated stringinto the conversation - Say "continue" and agent picks back up
- Error may occur again
Screenshot and/or share link
https://opncd.ai/share/JtdU1xX3
Operating System
macOS 26.3
Terminal
Warp
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github-actions commentedon Jan 27, 2026
This issue might be a duplicate of existing issues. Please check:
These issues all involve JSON parsing errors during model execution. Feel free to ignore if this specific case with gpt-5.2-codex is different.
LeoNardo-LB commentedon Feb 4, 2026
Same issue
R44VC0RP commentedon Feb 4, 2026
hey @thesammykins can you run
opencode export > session.jsonon the session where you encountered that issue?thesammykins commentedon Feb 4, 2026
hey @R44VC0RP the session.json for the session is linked in my original comment :)
https://github.com/user-attachments/files/24871021/session.json
josh-burton commentedon Mar 19, 2026
Running into this constantly.
LyndseyPaxton commentedon Mar 24, 2026
I to am seeing this a lot (multiple times a day) running GPT-5.3 Codex. Not sure what additional info I can provide to help you guys diagnose this.
github-actions commentedon Jul 6, 2026
To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.