Kimi K2 vs OpenAI o4-mini
Compare Kimi K2 by Moonshot AI against OpenAI o4-mini by OpenAI, in 8 community votes, kimi k2 wins 57% of head-to-head duels, tested across 54 shared challenges. Updated May 2026.
Which is better, Kimi K2 or OpenAI o4-mini?
Kimi K2 is the better choice overall, winning 57% of 8 blind community votes on Rival. Kimi K2 costs $0.57/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between Kimi K2 and OpenAI o4-mini
Kimi K2 is made by moonshotai while OpenAI o4-mini is from openai. On pricing, Kimi K2 costs $0.57/M input tokens vs $1.1/M for OpenAI o4-mini. In community voting, In 8 community votes, Kimi K2 wins 57% of head-to-head duels.
In 8 community votes, Kimi K2 wins 57% of head-to-head duels. Kimi K2 leads in Web Design, while OpenAI o4-mini leads in Reasoning. Based on blind community voting from the Rival open dataset of 8+ human preference judgments for this pair.
Per 1M tokens
Kimi K2 is cheaper on both — 1.9× input, 1.9× output
Kimi K2 has the edge overall. In 8 blind votes, Kimi K2 wins 57% of the time.
Pick Kimi K2 for Web Design. Pick OpenAI o4-mini for Reasoning.
Style Comparison
Kimi K2 uses 424.9x more bold
