Meta open-sources Code World Model (CWM) and Llama 4 Scout/Maverick

Meta FAIR released Code World Model (CWM), a 32B-parameter open-weight LLM with 131k-token context that treats code as an executable world rather than static text — simulating execution, reasoning about program state, and self-detecting bugs. Meta also dropped Llama 4 Scout (single-GPU efficient) and Maverick (reasoning-heavy) at LlamaCon, with Microsoft's Satya Nadella separately revealing 30% of Microsoft code is now AI-generated.