Unverified50% confidenceFactExact time

Meta has never officially committed to open-sourcing (open weights) the Muse Spark 1.3 version, and the open-source claims circulating online are a misreading.

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

9/10/2026

First Seen

Valid until: 12/9/2026

Sources

Meta Muse Spark 1.3 In-Depth Review: The Truth Behind Top-Tier Coding Capability and Ultra-Low Pricing

Related Entities

Metacompany Muse Spark 1.3model

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