What is the difference between Claude 3.7 Sonnet and Kimi K2?

Claude 3.7 Sonnet is developed by Anthropic while Kimi K2 is developed by Moonshot AI. in 25 community votes on Rival, Kimi K2 wins 75% of head-to-head matchups. These results are based on blind head-to-head voting across 55 challenges.

Which is better, Claude 3.7 Sonnet or Kimi K2?

Based on 25 community votes on Rival, Kimi K2 wins 75% of head-to-head matchups against Claude 3.7 Sonnet. Kimi K2 is strongest in Reasoning, Web Design, Conversation.

How much does Claude 3.7 Sonnet cost compared to Kimi K2?

Claude 3.7 Sonnet costs $3/M input tokens and Kimi K2 costs $0.57/M input tokens. Kimi K2 is $2.43/M cheaper per input. Kimi K2 also wins more often in community votes, making it the better value.

How are Claude 3.7 Sonnet vs Kimi K2 votes collected on Rival?

Rival presents both models' outputs side-by-side in blind duels. Voters see the responses but don't know which model produced each one, eliminating brand bias. 25 votes have been collected for this pair across 55 challenges. All vote data is part of Rival's open dataset.

Updated Jul 2025

Claude 3.7 SonnetvsKimi K2

Kimi K2 wins 75% of 25 blind community votes against Claude 3.7 Sonnet on Rival.

Claude 3.7 Sonnet and Kimi K2 compared across 55 shared prompts
Spec	Claude 3.7 Sonnet	Kimi K2
Win rate	25%	75%
Input price	$3/M tokens	$0.57/M tokens
Output price	$15/M tokens	$2.3/M tokens
Context window	200K tokens	—
Weights	—	Open
Free API (OpenRouter)	No	No
Released	Feb 2025	Jul 2025
SWE-bench Verified	70.3%	65.8%