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Llama 3.1 70B (Instruct) vs OpenAI o4-mini

Compare Llama 3.1 70B (Instruct) by Meta AI against OpenAI o4-mini by OpenAI, tested across 23 shared challenges. Updated April 2026.

Which is better, Llama 3.1 70B (Instruct) or OpenAI o4-mini?

Llama 3.1 70B (Instruct) and OpenAI o4-mini are both competitive models. Llama 3.1 70B (Instruct) costs $0.59/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.

Key Differences Between Llama 3.1 70B (Instruct) and OpenAI o4-mini

Llama 3.1 70B (Instruct) is made by meta while OpenAI o4-mini is from openai. On pricing, Llama 3.1 70B (Instruct) costs $0.59/M input tokens vs $1.1/M for OpenAI o4-mini.

Our Verdict
Llama 3.1 70B (Instruct)
Llama 3.1 70B (Instruct)
OpenAI o4-mini
OpenAI o4-mini

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Llama 3.1 70B (Instruct) is 5.6x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
99%

Llama 3.1 70B (Instruct) uses 342.8x more bold

Llama 3.1 70B (Instruct)
OpenAI o4-mini
51%Vocabulary73%
18wSentence Length15w
0.46Hedging0.18
3.4Bold0.0
5.6Lists2.1
0.00Emoji0.00
0.00Headings0.00
0.06Transitions0.02
Based on 15 + 10 text responses
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Llama 3.1 70B (Instruct)OpenAI 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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