OpenAI to deploy models in Pentagon classified network on February 28, 2026

On February 28, 2026, Sam Altman said on X that OpenAI will deploy its models inside a classified Pentagon network under an agreement emphasizing safety constraints. The announcement came as defense leaders labeled Anthropic a national security supply chain risk and the president ordered federal agencies to stop using Anthropic, while a prior $200 million Pentagon contract signed in July collapsed over use‑case guarantees.