Fireworks AI makes Meta's Muse Spark Open available on US serverless
AIFireworks AI makes Meta's open-weights Muse Spark Open available on its US-only serverless API with no US premium and Zero Data Retention by default. The post reports that the 816B-parameter mixture-of-experts model ranks first of 75 models on Vals AI's Harvey Legal Agent Benchmark at 25.4%, nearly 4x Claude Opus 5's 6.7%.
AIWhy it matters.
The post gives specific benchmark results against named rivals and states pricing and data-retention terms, so readers can check the open-weights claims for legal and finance work.
Source details
Fireworks AI Blog · fireworks.aiPublished · added here
Original title: Muse Spark Open on Fireworks: Meta’s open weights wodel, available on US serverless