Sam Altman, left, CEO of OpenAI, appears onstage with Microsoft CEO Satya Nadella at OpenAI DevDay, OpenAI's first developer conference, on Monday, Nov. 6, 2023 in San Francisco. (AP Photo/Barbara ...

The lawsuit that could rewrite the rules of AI copyright Microsoft, GitHub, and OpenAI are being sued for allegedly violating copyright law by reproducing open-source code using AI.