Microsoft Leads 200-Firm Push for Open-Weight AI as Moonshot K3 Intensifies Clash
Updated
Updated · ZDNet · Jul 29
Microsoft Leads 200-Firm Push for Open-Weight AI as Moonshot K3 Intensifies Clash
3 articles · Updated · ZDNet · Jul 29
Summary
Moonshot AI’s Kimi K3, which rivals Anthropic’s Fable 5 and approaches OpenAI’s GPT-5.6 on speed, has sharpened the fight between open-weight and proprietary AI camps.
Microsoft responded with an “Open Weights and American AI Leadership” statement, arguing downloadable models cut costs and improve security; Amazon, Nvidia, Google and nearly 200 startups back that stance.
Washington’s dispute centers on distillation: Trump tech adviser Michael Kratsios said Moonshot may have distilled Anthropic’s model, while supporters of open weights say such techniques can be legitimate and should not justify broad restrictions.
Anthropic remains outside the open-weight coalition and calls for crackdowns on industrial-scale distillation and mandatory safety testing, while OpenAI joined the letter but has also supported tougher security reviews.
The broader split is strategic as much as technical: open-weight backers want wider model access and cloud demand, while Anthropic and OpenAI depend more heavily on premium closed models retaining an edge.