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Muse Spark 1.3 vs GLM-5.3-Flash

Muse Spark 1.3Meta
GLM-5.3-FlashZ.ai
Our take

Muse Spark 1.3 wins 4 of 4 categories, but GLM-5.3-Flash is 8.4× cheaper for everyday text work. Pick Muse Spark 1.3 when quality matters most, GLM-5.3-Flash at volume.

Overall68Best55
Coding75Best69
Writing70Best64
Support71Best67
Value62Best60
Input / 1M$1.25$0.15Best
Output / 1M$4.25$0.50Best
Blended / 1M$2.00$0.24Best
Context window1MBest1M
Open weightsNoYes
Released2 Sept 202626 Aug 2026

Your monthly bill

50k
Muse Spark 1.3$400
GLM-5.3-Flash$47.50Cheapest
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.