# Meta Puts Muse Spark 1.1 Behind a Metered API and Undercuts Anthropic on Input Tokens

The agentic multimodal model carries a one-million-token context window and lists at $1.25 per million input tokens against $10 for Claude Fable 5.1, with Meta charging developers directly for the first time.

- Published: 2026-09-13T06:28:59.111Z
- Canonical: https://polylog.news/ai/2026-09-13/meta-puts-muse-spark-1-1-behind-a-metered-api-and-undercuts
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Meta AI](https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/), [Fortune](https://fortune.com/2026/07/09/meta-muse-spark-1-1-release-alexandr-wang-superintelligence-labs-mark-zuckerberg/)

Meta's Muse Spark 1.1 is the second model from Meta Superintelligence Labs and the first Meta model sold through a metered application programming interface (API). It is a multimodal reasoning model built for agentic work, with a one-millio…

This story is for subscribers. Read it in full at https://polylog.news/ai/2026-09-13/meta-puts-muse-spark-1-1-behind-a-metered-api-and-undercuts (subscription information: https://polylog.news/pricing).