None of the signatories sells access to a closed frontier model.

Nearly 200 US startups, including Y Combinator and Proton, warn a ban on Chinese open-weight AI would kill hundreds of them and hand the market to Anthropic.

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?