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Meta AI · Shipped

Muse Spark Open release date

Specs, benchmarks and changelog are on the Muse Spark Open model card at TPS.

Released

Oct 15, 2026

What we know

Meta's open-weight multimodal model accepting text, images, video, and audio, reported on par with leading open Chinese models and optimized for local use on Apple M5 Ultra. The article is a secondary report, so the license, active parameter count, and Meta's primary announcement were not checked.

Spec

Params
816B
Active
42B
Context
1M tokens
Weights
Open
Modality
Not stated
Codename
Not stated

Every claim

3 from 3 sources
  • TechmemeRepostOct 15

    Techmeme relays Meta AI Research's announcement that Muse Spark Open is available today, a 816B-total, 42B-active open-weight model with a 1M-token context.

    points at Oct 15exact datesource
  • OpenRouter catalogSpotted in the wildOct 15

    OpenRouter's catalog lists Muse Spark Open (id meta/muse-spark-open) as routable as of 2026-10-15, a coding-focused open-weight model with a 1048576-token context window.

    points at Oct 15exact datesource
  • The DecoderPressOct 15

    The Decoder reports Meta has released Muse Spark Open, an 816B-parameter open-weight multimodal model, with no release date stated.

    no date givenno datesource
Official announcement