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Meta and Apple Bring Muse Spark Open AI Model to Mac Studio

The 816-billion-parameter model can run locally on Apple’s high-end desktop machines, with users able to split it across two to four Mac Studios.

  • On Thursday, Meta and Apple revealed a collaboration enabling developers to run Muse Spark Open, an 816-billion-parameter open-weight AI model, on high-end Mac Studio computers, marking a rare public partnership.
  • Meta AI Chief Alexandr Wang noted that Apple's unified memory architecture allows the M5 Ultra's integrated GPU to utilize up to 512 GB per machine, enabling two Mac Studios to function as one supercomputer.
  • Designed for complex software engineering and long-horizon tasks, the model is available under the Muse Model License, which allows free internal use but requires companies earning more than $20 million annually to sign a separate agreement.
  • A single Mac Studio with an M5 Ultra chip and 256GB of memory costs at least $10,799, requiring users to pair multiple devices to run the full 816-billion-parameter model locally.
  • This alliance signals a strategic shift in Silicon Valley, as Apple seeks to strengthen its AI chip capabilities against Nvidia, while Meta positions Muse Spark Open as the most capable U.S. open-weight model to date.
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Meta built a huge open-weight AI model for Macs, but you'll need 1TB of RAM to run it

Muse Spark Open is "the most capable US open-weight model to date," the company says.

·Fishers, United States
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9to5Mac broke the news in Cupertino, United States on Thursday, October 15, 2026.
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