GPT-4.1 Nano vs Kimi K2.5
Compare GPT-4.1 Nano by OpenAI against Kimi K2.5 by Moonshot AI, context windows of 1.0M vs 262K, tested across 53 shared challenges. Updated April 2026.
Which is better, GPT-4.1 Nano or Kimi K2.5?
GPT-4.1 Nano and Kimi K2.5 are both competitive models. GPT-4.1 Nano costs $0.1/M input tokens vs $0.6/M for Kimi K2.5. Context windows: 1048K vs 262K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.1 Nano and Kimi K2.5
GPT-4.1 Nano is made by openai while Kimi K2.5 is from moonshotai. GPT-4.1 Nano has a 1048K token context window compared to Kimi K2.5's 262K. On pricing, GPT-4.1 Nano costs $0.1/M input tokens vs $0.6/M for Kimi K2.5.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GPT-4.1 Nano is 7.5x cheaper per token — worth considering if cost matters.
Style Comparison
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
