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gpt-5.5 tool calling regression #31609
Description
What version of Codex CLI is running?
codex-cli 0.143.0
What subscription do you have?
Plus
Which model were you using?
gpt-5.5
What platform is your computer?
Darwin 25.5.0 arm64 arm
What terminal emulator and version are you using (if applicable)?
No response
Codex doctor report
What issue are you seeing?
All models across the gpt-5.5 (Low, medium, high, xhigh) all fail with the same error:
unsupported call: exec_commandexec_command
gpt-5.4 doesn't have this problem.
What steps can reproduce the bug?
Run codex in a workspace with sufficient permissions. Use the following prompt:
List contents of this directory, and if you face any tool call erorrs - report them.
What is the expected behavior?
No response
Additional information
No response
Reacted by nikjankov, TaeeunKil, David Jacobson, pavel, Paprikar, Junpeng, pittaya-ws, Kazunori Ninomiya and JP Filevich
Reacted by Sebastian Korotkiewicz, hwei and Gowtham Sridhar
Activity
just4koros commentedon Jul 8, 2026
I'm seeing the same issue.
Environment:
Symptoms:
Run lsreturns:unsupported call: exec_command--sandbox danger-full-access --ask-for-approval neverImportant finding:
Switching to GPT-5.4 medium immediately fixes the issue. The same prompt (
Run ls) executes successfully on GPT-5.4.codex doctorreports no failures.skorotkiewicz commentedon Jul 8, 2026
I have the same issue with gpt5.5 only, with gpt5.4 works somehow?!
El-Magico777 commentedon Jul 8, 2026
Same issue. Plus account. Ubuntu. Codex CLI 0.143.0
Sogl commentedon Jul 8, 2026
Same on Mac Intel
gflengas commentedon Jul 8, 2026
Same issue while sshing to an Ubuntu 22.04.5 LTS server while using gpt5.5 . Switching to 5.4 actually starts being able to run all the commands again.
Also running gpt5.5 with opencode works as normal
Used npm install -g @openai/codex@0.142.5 and skipping to next version for now, since i assume we get new version for the new models tomorrow