Compaction stuck on gpt-5.5

“Error running remote compact task: The 'gpt-5.5' model is not supported when using Codex with a ChatGPT account.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/codex/issues/12769/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

Quiet. No reports and thumbs-up in the last two weeks, down from 2 a week at the mid-October peak.

Remote compaction still uses gpt-5.5 after switching models in existing chats. Sending a message in a chat that previously used GPT-5.5 fails with a remote compact task error saying 'gpt-5.5' is not supported.

Is this your bug?

File my report

Where: Desktop app compaction
Error text: Error running remote compact task: The 'gpt-5.5' model is not supported when using Codex with a ChatGPT account.
Versions: 26.1007.71326 to 26.1016.6573.0
Platforms: Windows
How bad: Stops work: a core feature can't be used. Some reports say it blocks them completely.

Part of: Compaction fails, thread stuck3 bugs

Remote compaction stream failure6 people
Compaction fails with context-window error in long-running threads3 people

Not quite your bug?

Existing chats stream disconnect2 people
Context compaction fails4 people

Original reports3, newest first

Oct 22, 2026Switching from 5.5 to 5.6 Sol triggers remote compaction error: Error running remote compact task: {"detail":"The 'gpt-5.5' model is not supported when using Codex with a ChatGPT account."}On GitHub#56164
Oct 15, 2026Codex Desktop: Remote compaction stuck on retired GPT-5.5 model after switching modelsOn GitHub#54226
Oct 14, 2026Windows desktop: GPT-5.5 → GPT-6.1 Sol compaction fallback fails and UI preserves obsolete model errorOn GitHub#54030