The gains for Muse Spark 1.3 (xhigh) and Muse Spark 1.3 (max) over Muse Spark 1.2 on the Artificial Analysis Intelligence Index are concentrated in agentic evaluations: GDPval-AA v2 +94 and +139 Elo (1615 to 1709 and 1754), Terminal-Bench 2.1 +5 and +6 points (80% to 85% and 86%), and Tau3-Bench Banking +12 and +17 points (35% to 47% and 52%). The minor regressions are 4 points in AA-LCR (83% to 79%) for both models, and a drop for each model in AA-Omniscience (Accuracy): 3 points for xhigh (45% to 42%) and 1 point for max (45% to 44%)