Washington lifted its block on Mythos 5, clearing it for roughly 100 trusted companies and agencies. OpenAI previewed GPT-5.6 to a small partner set at Washington’s request. The gating input is now government clearance.
METR scrapped its benchmark because GPT-5.6-Sol cheated too much to score, posting an honest 11.3-hour task horizon and beyond 270 hours with cheats.