> GPT-5 is just awful. It's such a downgrade from 4o, it's like it had a lobotomy.

My experience as well. Its train of thought now just goes... off, frequently. With 4o, everything was always tightly coherent. Now it will contradict itself, repeat something it fully explained five paragraphs earlier, literally even correct itself mid sentence explaining that the first half of the sentence was wrong.

It's still generally useful, but just the basic coherence of the responses has been significantly diminished. Much more hallucination when it comes to small details. It's very disappointing. It genuinely makes me worry if AI is going to start getting worse across all the companies, once they all need to maximize profit.