Open Source AI Coalition Signatories Double to 50 with OpenAI and Google Joining

Signatories to the 'Open Weights' letter doubled to 50, adding OpenAI and Google. Anthropic, Amazon, Apple, and xAI remain unsigned, highlighting industry split on open-weight restrictions.

Woofun AI reports that the signatory list for the 'Open Weights and U.S. AI Leadership' open letter has expanded from 25 to 50 companies. New additions include OpenAI, Google, AMD, Cloudflare, GitHub, and Cisco, urging against premature restrictions on open-source model deployment.

Anthropic declined to sign, consistent with its lack of open-weight products and recent focus on leakage risks. Amazon, Apple, and xAI also remain unsigned, with Musk offering public support but no formal roster inclusion.