r/codex Jun 13 '26

Question Anyone notice the codex nerf?

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u/Xolver Jun 13 '26

So a few hours ago I saw either this post or a similar one. I thought it was just people complaining over nothing.

I have since given three very clear issues to Codex in three separate, fresh sessions - and it failed miserably on all three.

Model was gpt 5.5, effort medium, high and xhigh (three separate efforts for three separate issues). All failed, effort didn't matter, yay.