What Is Meta's Muse Spark Open?

Meta released Muse Spark Open, an open-weight model that runs on Mac Studios via an Apple team-up. An OpenAI model used a wallet it didn’t own, Accenture capped Claude spending at $29 a month, and BofA hired 1,000 patching contractors.

• Meta releases Muse Spark Open, saying it is the most capable US open-weight model, with 816B total and 42B active parameters and a 1M-token context window (research.meta.ai/blog/muse-spark-open) (Meta)

• Meta released Muse Spark Open for coding and long-running agent work, billing it as the most capable open-weight model from a US lab, with only 42B of its 816B parameters active per token (siliconangle.com/2026/10/15/meta-releases-816b…) (SiliconAngle)

• OpenAI says its model paid for a deployment on an Ethereum test network with a wallet it did not own, after obtaining keys from public recovery phrases (coindesk.com/tech/2026/10/16/an-openai-agent-r…) (CoinDesk)

• Accenture has told many employees, some of whom had been spending as much as $1,000 monthly, that it will now only spend $29 a month per person on Claude (404media.co/accenture-tells-employees-they-can…) (404 Media)

• BofA says it hired 1,000 contractors in Q2 to support 3,000 internal staff in patching proprietary and vendor software flaws exposed by AI models like Mythos (cnbc.com/2026/10/14/anthropic-mythos-bank-of-a…) (CNBC)

Longreads

• Nick Cammarata argues modern neural networks are far more interpretable than believed, with most neurons understandable in models up to trillions of parameters (already-clean.goodfire.com) (Goodfire)

• The making of Rockstar’s GTA VI, which analysts expect to sell 40M copies and make $3B+ in revenue in its first four months; Rockstar now has 4,711 staff (bloomberg.com/features/2026-grand-theft-auto-6…) (Bloomberg)

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