OpenAI is playing games.

When Anthropic says they have red lines, they mean "We refuse to let you use our models for these ends, even if it means losing nearly a billion dollars in business."

When OpenAI says they have red lines, they mean "We are going to let the DoD do whatever the hell they want, but we will shake our fist at them while they do it."

That's why they got the contract. The DoD was clear about what they wanted, and OpenAI wasn't going to get anywhere without agreeing to that. They're about as transparent as Mac from It's Always Sunny in Philadelphia when he's telling everyone he's playing both sides.