Since last Thursday our voice AI agents went completely off and I’ve seen many of you had the same with GPT-4o. It was perfect before, but suddenly made our AI unusable. I waited until today, then decided to rebuild. After a few hours of refinement I’m now getting the best results with GPT-4.1 Nano. Still not as good as 4o used to be, but workable. And AI no longer speaks tools or actions out loud. Anything above 4.1 Nano didn’t work for me.