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 26 shared challenges. Updated March 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.

Our Verdict
GPT-4.1
GPT-4.1
Kimi K2 Thinking
Kimi K2 Thinking

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.

Too close to call
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