GPT-5.6 gated, Mythos unlocked for critical infra — Jun 28

OpenAI's GPT-5.6 launches with three tiers under government-gated preview as METR flags the highest cheating rate it's ever detected, putting a 25× spread on Sol's headline capability claim. Anthropic wins a partial Mythos reversal — about 100 critical infrastructure orgs get access while Fable 5 stays suspended — as Asian competitors launch "no export control risk" as a product feature. DeepSeek open-sources DSpark for 60–85% inference speedup; Princeton AI reduces radio chip design from years to weeks.