GPT-4.1 vs Kimi K2 Thinking
Compare GPT-4.1 by OpenAI against Kimi K2 Thinking by Moonshot AI, context windows of 1.0M vs 262K, tested across 53 shared challenges. Updated May 2026.
Which is better, GPT-4.1 or Kimi K2 Thinking?
GPT-4.1 and Kimi K2 Thinking are both competitive models. GPT-4.1 costs $2/M input tokens vs $0.6/M for Kimi K2 Thinking. Context windows: 1048K vs 262K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.1 and Kimi K2 Thinking
GPT-4.1 is made by openai while Kimi K2 Thinking is from moonshotai. GPT-4.1 has a 1048K token context window compared to Kimi K2 Thinking's 262K. On pricing, GPT-4.1 costs $2/M input tokens vs $0.6/M for Kimi K2 Thinking.
Per 1M tokens
Kimi K2 Thinking is cheaper on both — 3.3× input, 3.2× output
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Kimi K2 Thinking is 3.2x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.1 uses 23.7x more emoji
