What is the difference between Kimi K2.5 and OpenAI o4 Mini High?

Kimi K2.5 is developed by Moonshot AI while OpenAI o4 Mini High is developed by OpenAI. Kimi K2.5 has a 262K token context window vs OpenAI o4 Mini High's 200K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Kimi K2.5 or OpenAI o4 Mini High?

It depends on your use case. Kimi K2.5 and OpenAI o4 Mini High each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Kimi K2.5 cost compared to OpenAI o4 Mini High?

Kimi K2.5 costs $0.6/M input tokens and OpenAI o4 Mini High costs $1.1/M input tokens. Kimi K2.5 is $0.50/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 K2.5 and OpenAI o4 Mini High on Rival?

This page shows a side-by-side comparison of Kimi K2.5 and OpenAI o4 Mini High 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 Jan 2026

Kimi K2.5vsOpenAI o4 Mini High

Kimi K2.5 is cheaper than OpenAI o4 Mini High at $0.6/M vs $1.1/M input tokens.

Kimi K2.5 and OpenAI o4 Mini High compared across 53 shared prompts
Spec	Kimi K2.5	OpenAI o4 Mini High
Input price	$0.6/M tokens	$1.1/M tokens
Output price	$3/M tokens	$4.4/M tokens
Context window	262K tokens	200K tokens
Weights	Open	Closed
Free API (OpenRouter)	No	No
Released	Jan 2026	Apr 2025
SWE-bench Verified	76.8%	68.1%