Muse (Meta)
Muse (Meta) is a model family from Meta (Meta Superintelligence Labs)15, with 2 assessed releases in this catalog. Licenses and availability are recorded for each release, not for the family; its releases use the Apache License 2.0 and the Muse Model License (version Muse Spark Open).
Muse is a model family from Meta Superintelligence Labs, introduced with Muse Spark in April 2026. Muse Spark versions are offered through Meta AI and the Meta Model API without public weights. Muse Glimmer, released in August 2026, is an open-weight model distilled from Muse Spark. Meta's developer site also lists Muse Image and Muse Voice Transcribe.154
- Release notes: Muse Spark announcement (external site: ai.meta.com)
- Website: Meta AI developer site (external site: dev.meta.ai)
- Model hub: Muse Glimmer on Hugging Face (external site: huggingface.co)
On AI on Hugging Face: meta-models/Muse-Glimmer-30B
Releases assessed
| Release | Weights | Tier (USASI rubric v0.2) | License | Released |
|---|---|---|---|---|
| Muse Glimmer 30B | Weights: Public | Model-disclosure tier (USASI rubric v0.2): Open-weight | Apache-2.0 | Aug 2026 |
| Muse Spark Open 816B-A42B | Weights: Partial | Model-disclosure tier (USASI rubric v0.2): Restricted weights | Muse Model License (version Muse Spark Open) | Oct 15, 2026 |
What it is useful for
Organization context
In the news
Meta releases Muse Spark Open, an open-weight version of Muse Spark, under the Muse Model License
On October 15, 2026 Meta released Muse Spark Open, which its developer blog describes as the open-weight version of Muse Spark, trained for long-horizon agentic work such as coding and customer service agents. The model card lists 816B total and 42B active parameters, a context window of 1M tokens, text, image, video, and audio input, and text output; BF16 and NVFP4 checkpoints are on Hugging Face, and downloading them requires accepting the license conditions and submitting an access form. The weights are released under the Muse Model License, which requires a visible "Built with Muse Spark Open" attribution, incorporates a Usage Policy, and requires some large API providers to sign a separate agreement with Meta; the license does not describe itself as open source. USASI has not tested this model.
Meta releases Muse Wonder and Muse Wonder Full through its Model API and Muse Code
On October 12, 2026 Meta announced two new models in its Muse family, Muse Wonder and Muse Wonder Full, which it says were built on the groundwork laid with Muse Spark. According to the announcement, Muse Wonder is available that day for developers and builders through the Meta Model API and Muse Code, and Muse Wonder Full is available to Muse Code subscribers. Meta says Muse Wonder will soon power experiences in Muse, rolling out first to subscribers. The announcement does not name a license or say that model weights are released, and USASI has not tested either model.
Meta publishes MetaEncoder-30B, a gated Apache 2.0 multimodal encoder for decision tasks
Meta has published MetaEncoder-30B on Hugging Face as facebook/meta-encoder. The model card describes it as a multimodal bi-encoder, a "Multimodal System One Encoder", in which both the task and each candidate are written in natural language, with text, images, and video usable on either side. The card says it was built by contrastively fine-tuning Muse-Glimmer-30B and is released under Apache 2.0, inherited from the base model, with use also subject to the base model's Usage Policy; the files can be downloaded only after accepting access conditions on Hugging Face. The accompanying paper was submitted to arXiv on October 8, 2026; the model card does not give a release date. USASI has not tested MetaEncoder-30B.
Meta releases Muse Glimmer as an open-weight model under Apache 2.0
In August 2026 Meta Superintelligence Labs published Muse Glimmer, a model of about 30 billion parameters that takes text and images as input and was distilled from Muse Spark. Its weights can be downloaded from Hugging Face without an access request under the Apache 2.0 license, and the repository also includes a separate Muse Glimmer Usage Policy that lists prohibited uses. Muse Glimmer has its own release record under the Muse family.
Meta releases Muse Spark 1.1 and opens the Meta Model API in public preview
On July 9, 2026 Meta Superintelligence Labs introduced Muse Spark 1.1, which the announcement describes as a multimodal reasoning model built for agentic tasks and an upgrade over Muse Spark. Meta says the model is available in "Thinking" mode in the Meta AI app and on meta.ai, and that developers can reach it through the Meta Model API, which the post introduces as a public preview. The post lists a 1-million-token context window, computer use across multiple applications, and the ability to work as a main agent that delegates to parallel subagents. It does not say that the weights are released or give license terms. USASI has not tested Muse Spark 1.1.
U.S. eligibility
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.
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APA style
USASI. (2026, September 29). Muse (Meta). United States of America Superintelligence. https://unitedstatesofamericasuperintelligence.com/open/meta-muse/
BibTeX
@misc{usasi_meta_muse,
author = {{USASI}},
title = {Muse (Meta)},
year = {2026},
month = sep,
howpublished = {\url{https://unitedstatesofamericasuperintelligence.com/open/meta-muse/}},
note = {United States of America Superintelligence. Last updated 2026-09-29}
}The date is when this page was last updated. Add the date you read it if your style needs one.
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