What is the difference between Kimi K2 and o3 Mini?

Kimi K2 is developed by Moonshot AI while o3 Mini is developed by OpenAI. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, Kimi K2 or o3 Mini?

It depends on your use case. Kimi K2 and o3 Mini each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

How much does Kimi K2 cost compared to o3 Mini?

Kimi K2 costs $0.57/M input tokens and o3 Mini costs $1.1/M input tokens. Kimi K2 is $0.53/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Kimi K2 and o3 Mini on Rival?

This page shows a side-by-side comparison of Kimi K2 and o3 Mini across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Jul 2025

Kimi K2vso3 Mini

Kimi K2 is cheaper than o3 Mini at $0.57/M vs $1.1/M input tokens.

Kimi K2 and o3 Mini compared across 54 shared prompts
Spec	Kimi K2	o3 Mini
Input price	$0.57/M tokens	$1.1/M tokens
Output price	$2.3/M tokens	$4.4/M tokens
Context window	—	64K tokens
Weights	Open	Closed
Free API (OpenRouter)	No	No
Released	Jul 2025	Dec 2024