Perceived Drop in GPT-5 Quality Over the Last Few Weeks
OpenAI Developer Community
June 1, 2026
This is why I like to make my own harnesses and chain of thought.
But that’s a pfaff of course.
It could be OpenAI is fine tuning these things on the fly to balance priorities for compute.
I’m not sure we will ever know? It’s a bit opaque
But this is useful feedback for them …
Discussion in the ATmosphere