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GPT-4.1 Nano vs OpenAI o4-mini

Compare GPT-4.1 Nano and OpenAI o4-mini, both from OpenAI, tested across 34 shared challenges. Updated April 2026.

Which is better, GPT-4.1 Nano or OpenAI o4-mini?

GPT-4.1 Nano and OpenAI o4-mini are both competitive models. GPT-4.1 Nano costs $0.1/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.

Key Differences Between GPT-4.1 Nano and OpenAI o4-mini

GPT-4.1 Nano is made by openai while OpenAI o4-mini is from openai. On pricing, GPT-4.1 Nano costs $0.1/M input tokens vs $1.1/M for OpenAI o4-mini.

Our Verdict
OpenAI o4-mini
OpenAI o4-mini
GPT-4.1 Nano
GPT-4.1 NanoRunner-up

No community votes yet. On paper, OpenAI o4-mini has the edge — bigger model tier.

GPT-4.1 Nano is 11x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
83%

GPT-4.1 Nano uses 561.5x more bold

GPT-4.1 Nano
OpenAI o4-mini
57%Vocabulary73%
25wSentence Length15w
0.72Hedging0.18
5.6Bold0.0
4.9Lists2.1
0.00Emoji0.00
0.71Headings0.00
0.22Transitions0.02
Based on 24 + 10 text responses
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GPT-4.1 NanoOpenAI o4-mini

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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