GPT-5.2 Pro vs Llama 3.1 405B
Compare GPT-5.2 Pro by OpenAI against Llama 3.1 405B by Meta AI, context windows of 400K vs 128K, tested across 8 shared challenges. Updated April 2026.
Which is better, GPT-5.2 Pro or Llama 3.1 405B?
GPT-5.2 Pro and Llama 3.1 405B are both competitive models. GPT-5.2 Pro costs $21/M input tokens vs $2.7/M for Llama 3.1 405B. Context windows: 400K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-5.2 Pro and Llama 3.1 405B
GPT-5.2 Pro is made by openai while Llama 3.1 405B is from meta. GPT-5.2 Pro has a 400K token context window compared to Llama 3.1 405B's 128K. On pricing, GPT-5.2 Pro costs $21/M input tokens vs $2.7/M for Llama 3.1 405B.
No community votes yet. On paper, GPT-5.2 Pro has the edge — newer, bigger context window.
Llama 3.1 405B is 54x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-5.2 Pro uses 862.6x more bold
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.
