# Latest Muse model: Muse Spark Open

family: muse  
page: /models/muse  
as_of: 2026-11-04  
developer: /record/meta.md  

As of November 4, 2026, the latest Muse model on the AsOf record is Muse Spark Open, released on October 15, 2026 by Meta Platforms, from a primary source (research.meta.ai). The newest in each other line: Muse Wonder (October 12, 2026) and Muse Glimmer (August 10, 2026). The record holds 7 Muse models, 7 with a checked release date.

Source: https://research.meta.ai/blog/muse-spark-open · claim: /claim/clm_D58FC12544C0.md · model: /record/muse-spark-open.md

## Spark

Oldest first. A model's own record holds each date with its source.

- [Muse Spark](/record/muse-spark.md): released 2026-04-08; replaced Llama 4 Maverick; replaced by Muse Spark 1.1 · source: https://ai.meta.com/blog/introducing-muse-spark-msl/
- [Muse Spark 1.1](/record/muse-spark-1-1.md): released 2026-07-09; replaced Muse Spark · source: https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/
- [Muse Spark 1.2](/record/muse-spark-1-2.md): released 2026-08-05 · source: https://research.meta.ai/blog/introducing-muse-code-and-muse-spark-1-2
- [Muse Spark 1.3](/record/muse-spark-1-3.md): released 2026-09-02 · source: https://research.meta.ai/blog/introducing-muse-spark-1-3
- [Muse Spark Open](/record/muse-spark-open.md): released 2026-10-15 · source: https://research.meta.ai/blog/muse-spark-open

## Wonder

Oldest first. A model's own record holds each date with its source.

- [Muse Wonder](/record/muse-wonder.md): released 2026-10-12 · source: https://research.meta.ai/blog/muse-wonder

## Glimmer

Oldest first. A model's own record holds each date with its source.

- [Muse Glimmer](/record/muse-glimmer.md): released 2026-08-10 · source: https://research.meta.ai/blog/introducing-muse-glimmer-open-agentic-model

## Get this data

- JSON: /v1/models/muse
- MCP: entity_state(entity: "<model slug>") for one model; timeline(entity: "<model slug>", predicates: ["model_release", "predecessor", "deprecated", "retired"]) for its rows
- Every family: /models.md

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.