OpenAI's Sam Altman announced updates for ChatGPT, reintroducing GPT-4o for paid users and revealing new features for GPT-5.

In a surprise twist, paid subscribers can once again use several older AI models, including GPT-4o, GPT-4.1, and o3. GPT-4o ...

In March, OpenAI published research exploring the emotional bonds users form with its models. In the conclusion of the ...