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Meta open-sources Muse Spark weights tuned for Mac Studio

Giving away frontier-class weights for coding and agent work signals how Meta now competes: free distribution over gatekeeping.

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This brief comes from Tech Twitter’s edited headlines. The posts below are the sources grouped with the story; statements in them belong to their authors.

Alexandr Wang
1/ muse spark open is the most capable US open-weight model to date. 816B total params, 42B active. 1M-token context. natively multimodal. built for coding and agentic work like long-horizon tasks, hard software engineering, multi-step reasoning. america! 🇺🇲
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elvis
Damn! Looking at the results, Meta really cooked here! More progress on frontier open models is always a big deal. Great to see Meta going back to its roots. The only way to know this checkpoint's quality is to test it yourself.
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Cursor
Muse Wonder from Meta Superintelligence Labs is now available in Cursor! It scores 46.1% on CursorBench at default effort, the highest of any Muse model. Priced at $4/M input and $20/M output tokens.
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Aakash Gupta
Six months ago, Meta wouldn't let anyone outside the company download this AI. This morning they put it online for free so literally anyone can grab it, and they did it three days after building a better one. Pay attention to that order of events, because it's how Meta decides what to give away now. Back in April, Meta called Muse Spark the most powerful model it had ever made and kept the weights locked up. On Monday they launched Muse Wonder, which beats it. This morning all 816 billion parameters of Muse Spark went up on Hugging Face. So the rule at Meta seems pretty simple at this point. Something goes open source the week it stops being the best thing Meta sells. That's a big change from the Llama days. When Zuck released Llama 3.1 405B in 2024, it was the best model Meta had, and…
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How the headline evolved

  1. Meta open-sources Muse Spark weights tuned for Mac Studio

  2. Meta open-sources Muse Spark weights tuned for Mac Studio

  3. Meta releases Muse Spark Open weights for coding and agents

  4. Meta releases Muse Spark Open weights for coding and agents

  5. Meta releases Muse Spark Open weights for coding and agents

  6. Meta releases Muse Spark Open weights for coding and agents

  7. Meta releases Muse Spark Open, its strongest open-weight model

  8. Meta ships Muse Spark Open weights tuned for Mac Studio

  9. Meta ships Muse Spark Open weights tuned for Mac Studio

  10. Meta releases Muse Spark Open weights tuned for Mac Studio

  11. Meta releases Muse Spark Open weights tuned for Mac Studio

  12. Meta releases Muse Spark Open weights tuned for Mac Studio

  13. Meta releases Muse Spark Open weights that run on Mac Studio

  14. Meta releases Muse Spark Open weights that run on Mac Studio

  15. Meta releases Muse Spark Open weights that run on Mac Studio

  16. Meta ships Muse Spark Open weights tuned for Mac Studio

  17. Meta releases Muse Spark Open as the top US open-weight model

  18. Meta releases Muse Spark Open as the top US open-weight model

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