A practitioner's guide to how U.S. sanctions reach advanced AI: when OFAC has jurisdiction, the SDN List and the 50 Percent Rule, comprehensive jurisdiction programs, the CMIC investment prohibition, model access and open weights, three enforcement cases, and the compliance steps that matter.

A practitioner's guide to how U.S. export controls reach advanced AI in 2026: the 3A090 chip controls, the AI Diffusion Rule that BIS never formally rescinded and that the GAO has now ruled remains in effect, the January 2026 opening for H200-class chips to China, model weights, deemed exports, and the compliance steps a company should take.