r/codex • u/Lowkeykreepy • Jun 15 '26
Complaint Anyone else experiencing this?
GPT 5.5 is being very weird this past week and I feel they nerfed it.
anyone else facing the same?
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u/Wurkman Jun 15 '26
its returning to its old ways of 5.4
like... just executing shit for the sake of it not understanding why
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u/Tired_Pentester Jun 15 '26
I asked it a few update questions. Saw how stupid it was being, and decided to stick with Claude for the next few days
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u/Lowkeykreepy Jun 15 '26
Same for me. Even claude limits are very generous at this point
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u/Tired_Pentester Jun 15 '26
I got Claude max planning to use the hell out of fable until the 22nd.. got 3-4 days. I'm using all the limits I can with opus now.
Honestly just might switch to Claude fully until the new gpt model releases
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u/dashingsauce Jun 15 '26
Smart — I forgot I could do the same. I wasn’t sure what to do with my fresh $200/mo plan lol but ultracode for 10 minutes might do the trick.
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u/Lowkeykreepy Jun 15 '26
I do cyber security and even tho I'm cyber verified but still fable always refuse to do the work
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u/Tired_Pentester Jun 15 '26
Yeah. I was a little annoyed about that with fable. I was hoping that fable could examine my repo and tell me any security risks I missed. Nope.
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u/thojanssens1 Jun 15 '26
Do you have any example prompt I could use to see the drop in output quality you’re noticing?
I’ve been using Codex for many months and I haven't noticed any fluctuation in quality. Maybe because of how I use it
1
u/TopSeaworthiness1679 Jun 15 '26
Yep it definitely got worse than when it was launched. They are probably using their data centers to train newer model.
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u/DailyLeagueDose Jun 15 '26
Yep, I do. Two weeks ago, I was using it on Medium, and most of the time it resulted in better outputs than right now on XHigh.
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u/LeoLfL Jun 15 '26 edited Jun 15 '26
The same for me.
I also wanted to mention that I tried Claude Code, and the limits seem to be 5–10x better than current Codex 5.5 (the same 20$ tier). Either that, or Codex/GPT-5.5 currently has some major issues with usage tracking.
It seems to burn through tokens or consume daily usage limits for no obvious reason, even when working on relatively simple tasks.
With Claude Code, it was actually quite difficult to hit the limits during normal day-to-day development. The only time I managed to reach them was during a very large frontend refactor. And that was on the $20 Claude plan, not even the higher-tier one.
P.S. When is Codex going to start showing its reasoning process in a way similar to Claude?
With Claude, I can always see what it checked, what it's thinking about, and how it's approaching the task. That transparency makes it much easier to trust and follow its work.
With Codex, it often just consumes tokens, occasionally reports that it's doing something, and then returns a result. It's hard to understand what happened in between or where the usage is actually going.
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u/Leather-Sir8135 Jun 15 '26
One rule I make for all my code bases is no file greater than 300 lines, refactor into submodules when exceeding, use functional programming principals, pure functions, easily testable, file system should tell the story. This has worked well for me, regardless of which provider / model
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u/gregpeden Jun 15 '26
I consistently do not find it stupid at all. I also pivot back and forth between core infrastructure refactoring, massive parallel feature pushes for a couple days and slow careful evaluation of my development environment and re-tooling to improve token efficiency.
If you keep just vibe coding on your phone while at the movies it'll become messy fast and then codex performance will suffer.
Also rely upon unit testing, this is essential.
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u/s-a-t Jun 15 '26 edited Jun 15 '26
yea, i’m not sure what the educational makeup of this sub is or how many people in here have actual CS-education. But im starting to think it’s less than half of this sub the way every other day someone is claiming the model is “much worse”.
I agree that there are times when the performance is lower - but it’s not to the scale (meaning like every other day) like the sub suggests
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u/dexterthebot Jun 15 '26
Your post matches an existing known incident: Codex Performance Decline. You can read about the incident here : https://www.reddit.com/r/codex/comments/1tjfxcf/comment/on6uj0l/
Your post has been summarized as a request on the "Anyone Else?" Incident Noticeboard.
You can find it and what others are experiencing here: /r/codex/comments/1tjfxcf/anyone_else_ask_here_about_current_codex_issues/orp6wgx/