
developer.meta.com
September 2, 2026
1 min read
63/100
Summary
Muse Spark 1.3 is trained for agentic workflows and optimized for competitive coding performance. Developers can expect higher first-attempt accuracy and reliable tool calling. Muse Spark 1.3 tracks context and prior results, works through messy or conflicting inputs, and asks for input when needed. Competitive coding performance Tuned for long-horizon coding workflows, with fewer unnecessary turn...