March 17 : OpenAI has signed a new deal to sell access to its AI models to U.S. defense and government agencies through Amazon's cloud unit for classified and unclassified work, the ChatGPT maker said on Tuesday. The contract enables OpenAI to support the Pentagon under a deal it secured late last month, after the agency dropped its previous AI provider, Anthropic. Anthropic, which won a Pentagon contract worth up to $200 million in July 2025, had been a key U.S. defense AI supplier, working