# Meta Now Sells Its Frontier Model by the Token While Open-Sourcing Only the Smaller One

Muse Spark is metered through an OpenAI-compatible application programming interface (API) at $1.25 and $4.25 per million input and output tokens, while the 30-billion-parameter Glimmer model ships with downloadable weights under a permissive license.

- Published: 2026-08-21T06:31:32.224Z
- Canonical: https://polylog.news/ai/2026-08-21/meta-now-sells-its-frontier-model-by-the-token-while-open-so
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Meta AI](https://ai.meta.com/blog/introducing-muse-image-muse-video-msl/), [Meta AI](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/)

Meta's model business now operates in two separate parts, and the split matters because Meta spent three years arguing that open weights were the strategy. The top-tier Muse Spark line is sold through the Meta Model API, an OpenAI-compatibl…

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