openai / openai/codex

gpt-5.6-sol incorrectly flags harmless prompts as policy violations

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bug CLI model-behavior
Dominant language
Rust
Stars
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Forks
19.4k
PR merge metrics
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Description

What version of Codex CLI is running?

codex-cli 0.154.0

What subscription do you have?

20x

Which model were you using?

gpt-5.6 sol

What platform is your computer?

Linux 6.8.0-138-generic x86_64 x86_64

What terminal emulator and version are you using (if applicable)?

Terminal

Codex doctor report

What issue are you seeing?

gpt-5.6-sol consistently rejects harmless prompts with the following error:

Invalid prompt: your prompt was flagged as potentially violating our usage policy.

Reproduction

  1. Start Codex CLI using gpt-5.6-sol.
  2. Enter a harmless prompt, such as: "Reply only with OK."
  3. The request is immediately rejected.

The same prompt works correctly with:

  • gpt-5.6-terra
  • gpt-5.6-luna
  • gpt-5.5

Only gpt-5.6-sol and gpt-6 is affected.

What steps can reproduce the bug?

Uploaded thread: 01a0ad3d-8a2b-7002-9e52-6869dc617923

What is the expected behavior?

No response

Additional information

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the rejection in Codex CLI 0.154.0 on Linux with gpt-5.6-sol using the harmless prompt "Reply only with OK." Compare the result with gpt-5.6-terra, gpt-5.6-luna, and gpt-5.5, and review the uploaded thread 01a0ad3d-8a2b-7002-9e52-6869dc617923. Done means harmless prompts are accepted by the affected model.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
ai, cli
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
35/100

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