What is the difference between DeepSeek R1 and Kimi K2 0905?

DeepSeek R1 is developed by DeepSeek while Kimi K2 0905 is developed by Moonshot AI. DeepSeek R1 has a 128K token context window vs Kimi K2 0905's 262K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

Which is better, DeepSeek R1 or Kimi K2 0905?

It depends on your use case. DeepSeek R1 and Kimi K2 0905 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 DeepSeek R1 cost compared to Kimi K2 0905?

DeepSeek R1 costs $0.55/M input tokens and Kimi K2 0905 costs $0.6/M input tokens. DeepSeek R1 is $0.05/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 DeepSeek R1 and Kimi K2 0905 on Rival?

This page shows a side-by-side comparison of DeepSeek R1 and Kimi K2 0905 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 Sep 2025

DeepSeek R1vsKimi K2 0905

DeepSeek R1 is cheaper than Kimi K2 0905 at $0.55/M vs $0.6/M input tokens.

DeepSeek R1 and Kimi K2 0905 compared across 54 shared prompts
Spec	DeepSeek R1	Kimi K2 0905
Input price	$0.55/M tokens	$0.6/M tokens
Output price	$2.19/M tokens	$2.5/M tokens
Context window	128K tokens	262K tokens
Weights	Open	Open
Free API (OpenRouter)	No	No
Released	Feb 2025	Sep 2025