Meta Plans to Open-Weight Its Larger Muse Spark 1.2 Flagship Model

Meta intends to release the weights for Muse Spark 1.2, its larger and more powerful closed flagship, CNBC reported on August 10, 2026. The move would narrow the gap between Meta's closed and open model tiers, which currently run on separate tracks: a proprietary flagship and an Apache 2.0-licensed sibling. No release date was given.