GPT-4.1 Nano vs o1
Compare GPT-4.1 Nano and o1, both from OpenAI, context windows of 1.0M vs 128K, tested across 54 shared challenges. Updated April 2026.
Which is better, GPT-4.1 Nano or o1?
GPT-4.1 Nano and o1 are both competitive models. GPT-4.1 Nano costs $0.1/M input tokens vs $15/M for o1. Context windows: 1048K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.1 Nano and o1
GPT-4.1 Nano is made by openai while o1 is from openai. GPT-4.1 Nano has a 1048K token context window compared to o1's 128K. On pricing, GPT-4.1 Nano costs $0.1/M input tokens vs $15/M for o1.
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 150x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.1 Nano uses 1.9x more lists
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.
