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Meta releases Muse Spark Open with 1M context and restrictive license

By PulseAugur Editorial · [1 sources] ·

Meta has released Muse Spark Open, an 816 billion parameter model with 42 billion active parameters and a 1 million token context window. The model's license is similar to MIT but includes three specific conditions: products must acknowledge its use, derivatives are defined broadly, and API businesses exceeding $20 million in annual revenue require a separate agreement with Meta. The full 816 billion weights require approximately 700 GB of VRAM for operation. AI

IMPACT Sets a new precedent for 'open' model licensing with significant restrictions on commercial use and derivatives.

RANK_REASON Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Meta releases Muse Spark Open with 1M context and restrictive license

How we ranked this

Signal score
11 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Significant
Frontier-lab model release with system card. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release, product
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Mastodon — mastodon.social TIER_1 English(EN) · clydara ·

    Meta's Muse Spark Open: 816B total params, 42B active, 1M-token context. The license reads like MIT, then adds three conditions: 1. Products must show "Built wi

    Meta's Muse Spark Open: 816B total params, 42B active, 1M-token context. The license reads like MIT, then adds three conditions: 1. Products must show "Built with Muse Spark Open" 2. Derivatives include models trained or distilled on its outputs 3. API businesses past $20M revenu…

    LINKS clydara.wordpress.com/…/muse-spark-open-w… clydara.wordpress.com/…/10

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