Meta releases Muse Spark 1.3 with better agentic and coding performance

Introducing Muse Spark 1.3

Meta launched Muse Spark 1.3 today on Muse Code and Meta Model API. The model handles longer multi-step tasks by asking clarifying questions, requesting help when stuck, and confirming before taking consequential actions. Benchmarks show it beats Muse Spark 1.2, GPT 5.6 Sol (max), and Opus 5 (max) on agent, coding, instruction-following, and long-context evals. Two demos are included: one generates a CFD simulation report from CAD files and exports it as a PDF, another edits bass guitar mistakes in a multi-track session. The max reasoning mode is still undergoing safety testing and will ship later.

Why it matters: Meta ships Muse Spark 1.3 with agent/coding benchmarks beating GPT 5.6 on several metrics, plus three concrete interaction mechanisms that make agent deployment more practical. Held below 85 because it's an iterative release, not a new architecture, and max reasoning mode is s...