u/Copenhagen79

▲ 35 r/codex

Codex has been declining for me for the past two days

Ok, I am just gonna say it. Codex has been declining for me for the past two days. Extremely slow that's for sure - and it also feels like the "intelligence" has been degraded or maybe it is something in the harness after v0.130.0

I experience it running more in circles and continuing to fall back to mediocre and buggy solutions even though the instructions are quite clear. Yesterday it took 6 hours back and forth to add a rather simple feature I would have expected to take no more than an hour. I am still fixing the bugs it created today.

I have been using Codex on 20x daily (and nightly in periods) since September 2025, and as far as I remember, I haven't experienced this kind of degradation since the GPT-5.1 days. It has been an absolute monster up until now.

Also worth mentioning, that I experience the same perceived degradation across several different projects.

Anyone else seeing anything similar?

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u/Copenhagen79 — 2 days ago