Kimi K2 vs OpenAI o3
Compare Kimi K2 by Moonshot AI against OpenAI o3 by OpenAI, in 5 community votes, kimi k2 wins 80% of head-to-head duels, tested across 54 shared challenges. Updated May 2026.
Which is better, Kimi K2 or OpenAI o3?
Kimi K2 is the better choice overall, winning 80% of 5 blind community votes on Rival. Kimi K2 costs $0.57/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.
Key Differences Between Kimi K2 and OpenAI o3
Kimi K2 is made by moonshotai while OpenAI o3 is from openai. On pricing, Kimi K2 costs $0.57/M input tokens vs $10/M for OpenAI o3. In community voting, In 5 community votes, Kimi K2 wins 80% of head-to-head duels.
In 5 community votes, Kimi K2 wins 80% of head-to-head duels. Kimi K2 leads in Reasoning. Based on blind community voting from the Rival open dataset of 5+ human preference judgments for this pair.
Per 1M tokens
Kimi K2 is cheaper on both — 18× input, 17× output
Pick Kimi K2. In 5 blind votes, Kimi K2 wins 80% of the time. That's not luck.
Kimi K2 particularly excels in Reasoning. Kimi K2 is 17x cheaper per token — worth considering if cost matters.
Style Comparison
Kimi K2 uses 68.5x more emoji
