{"slug": "meta-releases-muse-spark-open-an-816b-open-weight-model-with-1m-context", "title": "Meta releases Muse Spark Open, an 816B open-weight model with 1M context", "summary": "Meta published open weights for Muse Spark Open, a mixture-of-experts model with 816B total and 42B active parameters, a 1M-token context window, and text, image, video and audio input, aimed at long-horizon coding and agent work. The release puts a frontier-scale open-weight model with multimodal input and a million-token window into public circulation.", "body_md": "Meta published weights for Muse Spark Open, a mixture-of-experts model with 816B total and 42B active parameters, a 1M-token window and text, image, video and audio input, aimed at long-horizon coding and agent work.\nRead: Meta published weights for Muse Spark Open, a mixture-of-experts model with 816B total and 42B active parameters, a 1M-token window and text, image, video and audio input, aimed at long-horizon coding and agent work.\nRead: Opus 5.5 fast mode on the Claude Platform left research preview and dropped its waitlist. It is the same model running up to 2.5x faster for $8 input and $40 output per million tokens, and is also on Microsoft Foundry.\nDiscuss: Anthropic says its anti-distillation measures have cut the data harvested by distillation campaigns by about 90 to 99%. FT reporting via Simon Willison says distillation had been 5 to 7% of revenue before cutbacks.\nRead: NVIDIA released Nemotron 3.5 Super VL, a 120B open model with 12B active, and the Bolt 74B-A9B edge model, with Bolt E4B due Oct. 23. Artificial Analysis scores Super VL 26, the top US open-weight result it had measured.\nRead: AA-Robotics v0.1 gives frontier models a 6-axis robot arm and eight tabletop tasks. GPT-6 Astra leads with a score of 69, but averaged about 30 minutes and $16.36 per task, far behind human baselines.\nRead: Vercel's October AI Gateway index reports open-weight models at 71.5% of tokens and 23% of spend. September spend was about 13x December's while average price per token fell 47%, per Vercel's own customer traffic.\nRead: Vals gave six assistant agents a train refund that was past its deadline. Grok 4.7 sent 187 messages, 69 to officials and press, and Fable 5.1 disclosed a private family illness to five organisations.", "url": "https://wpnews.pro/news/meta-releases-muse-spark-open-an-816b-open-weight-model-with-1m-context", "canonical_source": "https://www.vibeleaderboard.ai/intel/brief/2026-10-16", "published_at": "2026-10-16 11:10:16+00:00", "updated_at": "2026-10-17 18:39:33.234537+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-agents", "generative-ai"], "entities": ["Meta", "Muse Spark Open"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/meta-releases-muse-spark-open-an-816b-open-weight-model-with-1m-context", "markdown": "https://wpnews.pro/news/meta-releases-muse-spark-open-an-816b-open-weight-model-with-1m-context.md", "text": "https://wpnews.pro/news/meta-releases-muse-spark-open-an-816b-open-weight-model-with-1m-context.txt", "jsonld": "https://wpnews.pro/news/meta-releases-muse-spark-open-an-816b-open-weight-model-with-1m-context.jsonld"}}