Llama 3.1 405B vs OpenAI o4 Mini High
Compare Llama 3.1 405B by Meta AI against OpenAI o4 Mini High by OpenAI, context windows of 128K vs 200K, tested across 12 shared challenges. Updated April 2026.
Which is better, Llama 3.1 405B or OpenAI o4 Mini High?
Llama 3.1 405B and OpenAI o4 Mini High are both competitive models. Llama 3.1 405B costs $2.7/M input tokens vs $1.1/M for OpenAI o4 Mini High. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Llama 3.1 405B and OpenAI o4 Mini High
Llama 3.1 405B is made by meta while OpenAI o4 Mini High is from openai. Llama 3.1 405B has a 128K token context window compared to OpenAI o4 Mini High's 200K. On pricing, Llama 3.1 405B costs $2.7/M input tokens vs $1.1/M for OpenAI o4 Mini High.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Style Comparison
Llama 3.1 405B uses 4.5x more transitions
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.
