Models & Labs
Meta Releases 816B Open-Weights Muse Spark Model
Sam Witteveenhigh confidence
Why it matters
- →Meta's release of an 816B open-weights model expands the available high-capacity tools for developers.
- →Benchmarks against competitors like Reflection's Beam provide clear performance comparisons for the open-source community.
- →The open licensing allows for broader experimentation and fine-tuning, reducing reliance on closed APIs.
Meta has released Muse Spark Open, an 816B parameter AI model with open weights, according to a blog post by Sam Witteveen. The release includes benchmarks comparing it to competitors like Reflection's Beam and closed variants such as Muse Wonder. This move provides developers with access to a large-scale model for local inference or fine-tuning, potentially shifting the balance toward open-source alternatives. The accompanying analysis shows performance metrics and licensing terms, offering clarity on its practical utility for builders.
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Earlier coverage that leads up to this article, and what followed. Lines connect each piece to the closest one after it, converging here.
How we got here
- 1Meta's Muse Glimmer Model Now Available
Ollama Blog · August 10, 2026 · Related
- 2llama.cpp b11081 release with CUDA 13 and ROCm 10 support
llama.cpp Releases · September 22, 2026 · Related
- 3llama.cpp b11185 adds ROCm 10 and CUDA 13
llama.cpp Releases · September 26, 2026 · Same story
- 4Meta Muse agent security failures and enterprise push
The Verge AI · September 30, 2026 · Related
- 5Meta Muse AI Agent expands to iPad with new integrations
The Verge AI · October 7, 2026 · Related
- 6Meta releases Muse Spark Open, a massive open-weight coding model
Hugging Face Blog · October 15, 2026 · Same story
Follow this story
Open the full story →Meta and Apple collaborate on running Muse AI on Macs
3 developments
- Oct 15 · The Verge AI
Meta and Apple collaborate on running Muse AI on Macs - Oct 15 · TechCrunch AI
Meta launches Muse Spark Open for Macs - Oct 19 · Sam Witteveen
Meta Releases 816B Open-Weights Muse Spark Model (This article)
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