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GLM-5.3-Flash vs GLM-5.3

GLM-5.3-FlashZ.ai
GLM-5.3Z.ai
Our take

GLM-5.3 wins 2 of 4 categories, but GLM-5.3-Flash is 9.1× cheaper for everyday text work. Pick GLM-5.3 when quality matters most, GLM-5.3-Flash at volume.

Overall5561Best
Coding69Best68
Writing6470Best
Support6767
Value60Best54
Input / 1M$0.15Best$1.40
Output / 1M$0.50Best$4.40
Blended / 1M$0.24Best$2.15
Context window1M1M
Open weightsYesYes
Released26 Aug 202614 Aug 2026

Your monthly bill

50k
GLM-5.3-Flash$47.50Cheapest
GLM-5.3$430
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.
GLM-5.3-Flash vs GLM-5.3: scores, price and which to pick · Model Menu