GPT-5 vs Llama 3.1 405B
Compare GPT-5 by OpenAI against Llama 3.1 405B by Meta AI, context windows of 400K vs 128K, tested across 12 shared challenges.
Our Verdict
GPT-5
Llama 3.1 405BRunner-up
No community votes yet. On paper, GPT-5 has the edge — newer, bigger context window.
Llama 3.1 405B is 3.2x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5
Input
$1.25
2.2× cheaper
Output
$10.00
Llama 3.1 405B
Input
$2.70
Output
$3.10
3.2× cheaper
GPT-5 wins input (2.2× cheaper)·Llama 3.1 405B wins output (3.2× cheaper)
Writing DNA
Style Comparison
Similarity
49%
GPT-5 uses 18.9x more bold
GPT-5
Llama 3.1 405B
65%Vocabulary56%
13wSentence Length15w
0.20Hedging0.41
0.2Bold0.0
4.6Lists1.9
0.00Emoji0.03
0.16Headings0.00
0.03Transitions0.16
Based on 16 + 5 text responses
Research
What we learned reading every model
FAQ
