OpenAI, Meta, and xAI launched GPT-5.6, Muse Spark 1.1, and Grok 4.5 within 72 hours — the biggest single-week frontier model blitz yet, with GPT-5.6's Sol Ultra already claiming a mathematical proof of the Cycle Double Cover Conjecture. • Apple sued OpenAI for trade secret theft, alleging senior leadership directed former Apple engineers to steal hardware IP — a potentially existential legal threat to OpenAI's hardware ambitions. • Meta pulled its Instagram AI deepfake feature within days of launch after a backlash over consent, while also open-sourcing Muse Spark 1.1, a powerful multimodal agentic-coding model. • China's GLM-5.2 went viral on Hacker News after users ran it locally on slow consumer PCs, deepening fears of AI margin collapse as low-cost open models challenge Western lab pricing power. • Markets closed a wild week in positive territory — SOXL, QQQ, VGT, and VUG all up — but the coming week brings CPI data, heavy AI earnings, and SK Hynix's Nasdaq debut as the next big tests.