On Friday, President Trump ordered federal agencies to stop using Anthropic’s A.I. systems and Defense Secretary Pete Hegseth designated the company a “supply chain risk.” Then, just a few hours later, the OpenAI chief executive, Sam Altman, announced that his company reached an agreement with the Pentagon. The deal ensures its technology won’t be used for the same two safety concerns Anthropic raised: domestic mass surveillance or autonomous weapons. So what is going on? Is this a political vendetta between the Pentagon and Anthropic? Or are there substantive differences between the agreement Anthropic was offered and the one OpenAI signed? We cut through the confusion. Additional Reading: OpenAI Reaches A.I. Agreement With Defense Dept. After Anthropic Clash Trump Orders Government to Stop Using Anthropic After Pentagon Standoff We want to hear from you. Email us at hardfork@nytimes.com. Find “Hard Fork” on YouTube and TikTok. Subscribe today at nytimes.com/podcasts or on Apple Podca