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Meta releases Muse Spark Open weights for agentic coding and multimodal work

Meta released Muse Spark Open, an 816B-total, 42B-active model with a million-token context under its Muse Model License. It supports hosted and self-run deployment, including a demonstrated two-Mac-Studio MLX setup. Its coding and computer-use results are vendor-reported; open weights do not make the model small or unrestricted by license.

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CURRENT ASSESSMENT · REVISION 1
TOWARD DOOM30confidence 60/100

Why it moved the index

Distribution of a broadly capable tool-using model outside developer-hosted controls widens consequential agent access. Magnitude 30 reflects that diffusion, not openness alone; confidence is capped at 60 because downstream dangerous capability and control effects remain an inference from the released model and vendor tests.

Assessment history

  1. R1
    Toward 30 · confidence 60

    Owner-requested 30-day re-audit found this dated, materially distinct source absent from the durable catalogue.

    30 Oct 2026

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  1. DoomBench assesses “Meta releases Muse Spark Open weights for agentic coding and multimodal work” as evidence moving toward doom, with magnitude 30 and confidence 60 out of 100 in the competitive race category.

  2. The DoomBench assessment of “Meta releases Muse Spark Open weights for agentic coding and multimodal work” is based on reporting from Meta AI Research and records the editorial rationale, source quality, attribution, and revision history.

  3. DoomBench summarizes “Meta releases Muse Spark Open weights for agentic coding and multimodal work” as follows: Meta released Muse Spark Open, an 816B-total, 42B-active model with a million-token context under its Muse Model License. It...

    https://www.doombench.com/news/meta-releases-muse-spark-open-weights-for-agentic-coding-and-multimodal-work-2026-10-15