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Mistral Medium 3.5 vs Kimi K3

Mistral Medium 3.5Mistral AI
Kimi K3Moonshot AI
Our take

Kimi K3 wins 4 of 4 categories, but Mistral Medium 3.5 is 2.0× cheaper for everyday text work. Pick Kimi K3 when quality matters most, Mistral Medium 3.5 at volume.

Overall1865Best
Coding1974Best
Writing3569Best
Support4073Best
Value952Best
Input / 1M$1.50Best$3.00
Output / 1M$7.50Best$15.00
Blended / 1M$3.00Best$6.00
Context window262K1MBest
Open weightsYesYes
Released29 Apr 202616 Jul 2026

Your monthly bill

50k
Mistral Medium 3.5$600Cheapest
Kimi K3$1.2k
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.