Muse Spark 1.3 vs Kimi K3: scores, price and which to pick

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Our take

Muse Spark 1.3 wins 3 of 4 categories and costs less: 3.0× cheaper for everyday text work. Easy pick.

Overall68Best65

Coding75Best74

Writing70Best69

Support7173Best

Value62Best52

Input / 1M$1.25Best$3.00

Output / 1M$4.25Best$15.00

Blended / 1M$2.00Best$6.00

Context window1M1M

Open weightsNoYes

Released2 Sept 202616 Jul 2026

Your monthly bill

Tasks per month50k

Muse Spark 1.3$400Cheapest

Kimi K3$1.2k

List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.