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GPT-6.1 Sol vs Kimi K3

GPT-6.1 SolOpenAI
Kimi K3Moonshot AI
Our take

GPT-6.1 Sol and Kimi K3 trade wins evenly on our provisional scores, but GPT-6.1 Sol is 1.5× cheaper for everyday text work. Pick GPT-6.1 Sol when quality matters most, GPT-6.1 Sol at volume.

Overall74Best65
Coding78Best74
Writing5869Best
Support5873Best
Value64Best52
Input / 1M$2.00Best$3.00
Output / 1M$10.00Best$15.00
Blended / 1M$4.00Best$6.00
Context window1.1MBest1M
Open weightsNoYes
Released29 Sept 202616 Jul 2026

Your monthly bill

50k
GPT-6.1 Sol$800Cheapest
Kimi K3$1.2k
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.