GPT-5 models are actually great models for the API, the nano model is finally good enough to handle complex structured responses and it's even cheaper than GPT-4.1-nano.
GPT-5 is probably going to be a meaningful improvement for most of my non-technical family members who like ChatGPT but have never used anything other than 4o. In fact, most of the people I know who use ChatGPT pay no attention to the model being used, except for the developers I know. This update is going to be a big deal for them.
For me, it's just another nice incremental improvement. Nothing special, but who doesn't like smarter better models? The drop in hallucination rates also seems meaningful for real-world usage.
GPT-5 has to be one of the most underwhelming releases to date, and that's fresh on the heels of the "gift" of GPT-OSS.
The hottest news out of OpenAI lately is who Mark Zuckerberg has added to Meta's "Superintelligence" roster.