Microsoft, along with Meta, Nvidia, and more than 20 other companies, is pushing for open-weight AI models in an open letter. The strategic logic is simple: the more models running on Azure, the less Microsoft depends on expensive OpenAI and Anthropic models. The company is also swapping external models in products like Copilot for its in-house MAI family, which performs significantly worse in independent benchmarks.

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

Chinese open-weight models are gaining steam against leading offerings from American companies. OpenAI and Anthropic did not sign the letter.

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