Meta AI Research · Agentic Coding Model

Muse Spark 1.3

Released 2 September through Muse Code on macOS and Linux and the Meta Model API, aimed at agentic and coding work. Meta reports roughly 20% fewer tool calls and 25% fewer tokens on coding tasks than Muse Spark 1.2, plus better long-horizon execution, single-thread multitasking, self-awareness of its own limits and prompt-injection robustness. A scorecard compares it with 1.2, GPT 5.6 Sol and Opus 5 across agent, coding, instruction-following and long-context evaluations, but the figures are published as an image rather than text. Closed and API-only for now, with open weights stated as on the roadmap.