openai / openai/codex

GPT-5.6 SOL degraded when GPT-6 got released

Open
#44,190 2 comments 1 reaction 0 assignees View on GitHub

Nobody has claimed this yet.

app bug model-behavior performance
Dominant language
Rust
Stars
125k
Forks
19.4k
PR merge metrics
PR metrics pending

Description

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.903.61454

What subscription do you have?

PRO 20x 200USD

What platform is your computer?

MacOS

What issue are you seeing?

Hi,

i have realized the quality of GTP-5.6 degraded so much in last several days (it started when GPT-6 got released).

Performance is way worse, it is so slow.

It stops working for no reason very often, the deterioration is substantial. It hallucinates so much and output is like 10% quality of 3-4+ days ago..

It is hard to use right know and it is what a shame as far as i was so happy with everything about 5.6 before..

What steps can reproduce the bug?

..

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

No files, tests, entry points, reproducible steps, or expected behavior are provided. Start with the Codex App version 26.903.61454 on macOS and gather concrete examples, timing details, and relevant logs; the issue is ready for investigation once the reported degradation can be reproduced and its expected behavior is defined.

Written by the indexing model from the issue text.

Assessment

Tech stack
macos
Domain
ai, desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Needs clarification
Newbie friendliness
20/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.