# Meta Opens Its Frontier Model to Developers for the First Time With the Muse Spark API

Muse Spark 1.1 is a multimodal agentic model with a one-million-token context window, offered as Meta's first paid model application programming interface (API) in public preview for US developers.

- Published: 2026-08-02T05:44:51.872Z
- Canonical: https://polylog.news/ai/2026-08-02/meta-opens-its-frontier-model-to-developers-for-the-first-ti
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Meta AI](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/), [TestingCatalog](https://www.testingcatalog.com/meta-debuts-muse-spark-1-1-model-and-opens-api-for-developers/)

Meta released Muse Spark 1.1 and, for the first time, opened a metered Model API so outside developers can build on its frontier model directly. The public preview is limited to US-based developers. Muse Spark 1.1 is the second model from M…

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