Despite pressure from the Pentagon, the AI company said it would not give the US Defense Department unconditional use of its technology. The US government has threatened forced compliance under federal emergency powers.

Until this week, Anthropic was the only AI company cleared to deploy its models on classified networks. Elon Musk's xAI is now the second.

Anthropic, maker of Claude, has been clear that it has ethical concerns over unchecked government use of AI.