Muse Spark

Muse Spark 1.3 costs exactly what 1.2 costs, with the same 1M context and the same API. So the upgrade is a pure quality call. Here are the verified benchmark deltas, the documented audio regression, and the Contributor-tier trade-off.

Muse Spark is Meta's first proprietary, closed model — built by Meta Superintelligence Labs. What it is, the 1.1 paid API, benchmarks, pricing, and how it compares.