Fireworks AI adds Meta's open-weights Muse Spark Open to its US serverless API
Overview
Fireworks AI makes Meta's open-weights Muse Spark Open available on its US-only serverless API, with no US premium and Zero Data Retention on by default, according to a Fireworks AI blog post.
The post says the 816B-parameter mixture-of-experts model ranks first of 75 models on Vals AI's Harvey Legal Agent Benchmark at 25.4%, against 6.7% for Claude Opus 5.
The same post reports 53.3% on Rogo's Big Finance Bench, above Claude Opus 5's 49.2%, and 82.9% on Terminal-Bench 2.1 in Meta's own evaluations. These benchmark results are as reported by Fireworks AI and Meta, not independently verified.
Written by AI from the articles below · updated Oct 20, 5:07 PM ET
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- Fireworks AI BlogOfficialPickFireworks 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%. It also reports 53.3% on Rogo's Big Finance Bench, above Claude Opus 5's 49.2%, and 82.9% on Terminal-Bench 2.1 in Meta's evaluations.
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