OpenAI signs Microsoft-led open letter advocating for open-weight AI models, signaling a major strategic shift with implications for

The most popular frontier lab leaders are warning against powerful open-weight AI models.

Leading American technology firms have jointly endorsed open-weight artificial intelligence models. They believe this approach is crucial for maintaining United States leadership…

Letter explaining support comes amid rift over AI development philosophies and governance

Can you guess who didn't sign on to the group letter?