In March 2026, a number of pivotal departments within the United States government initiated the process of phasing out the utilization of Anthropic's AI products. Earlier, senior US officials had instructed government agencies to reassess their collaborative ties with Anthropic. Notably, the Pentagon went so far as to place Anthropic on its supply chain risk list, indicating concerns over potential vulnerabilities or dependencies. Both the US Secretary of the Treasury and the Director of the Federal Housing Finance Agency have verified that their respective departments, along with their affiliated agencies, will cease using Anthropic's offerings entirely. In light of these developments, the US State Department has made a strategic move by transitioning the foundational model of its internal chatbot, StateChat, from Anthropic's technology to OpenAI's GPT-4.1. This shift is driven by the desire to access more advanced technical support and stay at the forefront of AI innovation.