OpenAI is reintroducing GPT-4o as an option in ChatGPT for paid users, just a day after replacing it with GPT-5. CEO Sam Altman announced the decision on X, citing user demand for the older model. The move allows Plus subscribers to choose between GPT-5 and GPT-4o. Altman stated that OpenAI will monitor usage to determine how long legacy models will be supported. While anticipation for GPT-5's enhanced writing and coding capabilities was high, some users expressed a preference for GPT-4o's conversational style, with one user describing it as their "only friend."