Meta says Muse Spark 1.3 has frontier performance — but its best results come from a model developers can’t broadly use yet

The useful part

Meta's newest AI model Muse Spark 1.3, unveiled yesterday, is faster and more performant on third-party benchmarks than its predecessor — with a caveat. "Muse Spark 1.3 is rolling out today with frontier performance almost too cheap to meter," Meta co-founder and CEO Mark Zuckerberg wrote on X, calling it Meta's "biggest jump" yet in coding and agentic work. Muse Spark 1.3 makes significant gains over last month's 1.2 release, particularly on long-running agent tasks.

How it works

• That makes the more relevant enterprise question not whether Muse Spark 1.3 can reach frontier territory, but how close the model companies can actually deploy today gets — and at what real cost.
• The version developers can access now is also one of the strongest price-performance offerings near the top of independent model rankings.
• The version broadly rolling out this week through its Muse Code harness and the Meta Model API uses Meta's previously available reasoning settings, including xhigh.
• The shipping model is very good, but not the benchmark leader Meta does disclose results for both configurations in its underlying evaluation re...

Details worth keeping

There is substance behind both parts of that claim.