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GLM-5.3-Flash vs Kimi K3

GLM-5.3-FlashZ.ai
Kimi K3Moonshot AI
Our take

Kimi K3 wins 4 of 4 categories, but GLM-5.3-Flash is 25.3× cheaper for everyday text work. Pick Kimi K3 when quality matters most, GLM-5.3-Flash at volume.

Overall5565Best
Coding6974Best
Writing6469Best
Support6773Best
Value60Best52
Input / 1M$0.15Best$3.00
Output / 1M$0.50Best$15.00
Blended / 1M$0.24Best$6.00
Context window1M1MBest
Open weightsYesYes
Released26 Aug 202616 Jul 2026

Your monthly bill

50k
GLM-5.3-Flash$47.50Cheapest
Kimi K3$1.2k
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.