Meta enters AI race with Muse Spark, its major model since spending spree — here's what to know

Meta launched Muse Spark, its first major AI model after a big spending and hiring push.

The company says it outperforms Llama 4, with stronger reasoning for science, math, health, and agent-style tasks.

Muse Spark will power Meta AI across Facebook, Instagram, WhatsApp, Messenger, and Ray-Ban Meta glasses.

The model is closed rather than open source, and it is currently available only in the U.S.