Since the launch of OpenAI's powerful proprietary large language model (LLM) GPT-4 in March 2023 — 18 months ago — users and developers have wondered about when the company that kicked off the ...

Seven families filed lawsuits against OpenAI on Thursday, claiming that the company’s GPT-4o model was released prematurely and without effective safeguards. Four of the lawsuits address ChatGPT’s ...

In April of 2025, OpenAI released a new version of GPT-4o, one of the AI algorithms users could select to power ChatGPT, the company’s chatbot. The next week, OpenAI reverted to the previous version.

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