GPT-5 can indeed produce impressive results in benchmarks compared to competing AI models, but a lot of users have claimed that it's hardly an improvement over its predecessor, GPT-4o. Users have been flagging issues like bugs, glitches, and unresponsiveness since the rollout of GPT-5.

A quick glimpse of the ChatGPT subreddit (which is not affiliated with OpenAI) shows scathing reviews of GPT-5. Since the model began rolling out, the subreddit has filled with posts calling GPT-5 a "disaster," "horrible," and the "biggest piece of garbage even as a paid user."