Meta releases Muse Spark 1.3 for longer agentic work
Meta began rolling out Muse Spark 1.3 in Muse Code and the Meta Model API. The model targets longer, multi-step software work, can manage several tasks in one thread, ask for clarification and request confirmation before consequential actions. Meta reports roughly 20% fewer tool calls and 25% fewer tokens than Spark 1.2 in internal engineering comparisons.
Why it matters: A model that changes tool use, clarification and confirmation behaviour can alter both completed-task cost and the safety boundary of coding agents even when the surrounding harness stays fixed.