{"slug": "meta-releases-muse-spark-open-816b-open-weight-moe-with-1m-context", "title": "Meta Releases Muse Spark Open: 816B Open-Weight MoE With 1M Context", "summary": "Meta released Muse Spark Open, an 816B-parameter open-weight mixture-of-experts model with 42B active parameters and a 1M-token context window. The model leads open models on MCP-Atlas and runs on 2 M5 Ultra Mac Studios, according to MarkTechPost.", "body_md": "Meta released Muse Spark Open, an 816B-parameter open-weight MoE model with 42B active parameters and a 1M-token context. It leads open models on MCP-Atlas and runs on 2 M5 Ultra Mac Studios.\n\nThe post [Meta Releases Muse Spark Open: 816B Open-Weight MoE With 1M Context](https://www.marktechpost.com/2026/10/15/meta-muse-spark-open-816b-open-weight-model/) appeared first on [MarkTechPost](https://www.marktechpost.com).", "url": "https://wpnews.pro/news/meta-releases-muse-spark-open-816b-open-weight-moe-with-1m-context", "canonical_source": "https://www.marktechpost.com/2026/10/15/meta-muse-spark-open-816b-open-weight-model/", "published_at": "2026-10-16 02:26:04+00:00", "updated_at": "2026-10-16 03:32:33.361182+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products", "ai-tools", "agent-protocols"], "entities": ["Meta", "Muse Spark Open", "MCP-Atlas", "M5 Ultra Mac Studio", "MarkTechPost"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/meta-releases-muse-spark-open-816b-open-weight-moe-with-1m-context", "markdown": "https://wpnews.pro/news/meta-releases-muse-spark-open-816b-open-weight-moe-with-1m-context.md", "text": "https://wpnews.pro/news/meta-releases-muse-spark-open-816b-open-weight-moe-with-1m-context.txt", "jsonld": "https://wpnews.pro/news/meta-releases-muse-spark-open-816b-open-weight-moe-with-1m-context.jsonld"}}