Meta AILaunchAI ModelsOctober 15, 2026

Meta releases Muse Spark Open, 816B open-weight agentic coding model

Read original source →developer.nvidia.com

Muse Spark Open is an 816B-parameter mixture-of-experts model with 42B active parameters and a 1M-token context window, trained on NVIDIA GB300 NVL72 for agentic coding. Meta calls it the most capable US open-weight model to date; weights are on Hugging Face, SageMaker, Google Cloud Model Garden and Microsoft Foundry.

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