OpenAI noted that it was not totally eliminating older models like GPT-4o, which is about a year old at this point. However, these models are now limited to the developer API. For people who hopped on ChatGPT to have a conversation with their favorite AI, things are different now that GPT-5 is the default.

OpenAI CEO Sam Altman today said that the company will allow Plus users to continue to use the prior-generation GPT-4o model if they don't

OpenAI launched GPT-5 during a live-stream, claiming it improves reasoning, writing, and accuracy. However, users expressed frustration over losing access to previous models, reporting shorter responses and less personality,