GPT-4.1 Mini vs OpenAI o3

Compare GPT-4.1 Mini and OpenAI o3, both from OpenAI, tested across 54 shared challenges. Updated April 2026.

Which is better, GPT-4.1 Mini or OpenAI o3?

GPT-4.1 Mini and OpenAI o3 are both competitive models. GPT-4.1 Mini costs $0.4/M input tokens vs $10/M for OpenAI o3. Compare their real outputs side by side below.

Key Differences Between GPT-4.1 Mini and OpenAI o3

GPT-4.1 Mini is made by openai while OpenAI o3 is from openai. On pricing, GPT-4.1 Mini costs $0.4/M input tokens vs $10/M for OpenAI o3.

Our Verdict
OpenAI o3
OpenAI o3
GPT-4.1 Mini
GPT-4.1 MiniRunner-up

No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier.

GPT-4.1 Mini is 25x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
94%

GPT-4.1 Mini uses 6.8x more bold

GPT-4.1 Mini
OpenAI o3
59%Vocabulary68%
19wSentence Length14w
0.46Hedging0.26
4.7Bold0.7
4.9Lists3.0
0.00Emoji0.00
0.76Headings0.38
0.17Transitions0.12
Based on 23 + 16 text responses
vs

Ask them anything yourself

GPT-4.1 MiniOpenAI o3

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
Free preview13 of 58 slides
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