US artificial intelligence firm Anthropic has officially opened an office in Seoul, calling South Korea one of its fastest-growing markets globally, even as the company navigates restrictions imposed by the Trump administration on foreign access to its most advanced AI models. The Washington Post reported that the controls were triggered after officials discovered that a South Korean telecoms company, suspected of having ties to China, was among those set to receive access to Anthropic's top-tier models. Despite the restrictions, Anthropic's international managing director Chris Ciauri said the company plans to build partnerships with major cloud providers including Google Cloud, Microsoft, and Amazon, and is reviewing local data residency options — signalling a long-term commitment to one of its most active markets.