GPT-5.1 vs Llama 3.1 70B (Instruct)
Compare GPT-5.1 by OpenAI against Llama 3.1 70B (Instruct) by Meta AI, context windows of 400K vs 128K, tested across 49 shared challenges.
Our Verdict
GPT-5.1
Llama 3.1 70B (Instruct)Runner-up
No community votes yet. On paper, GPT-5.1 has the edge — bigger model tier, newer, bigger context window.
Llama 3.1 70B (Instruct) is 13x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GPT-5.1
Input
$1.25
Output
$10.00
Llama 3.1 70B (Instruct)
Input
$0.59
2.1× cheaper
Output
$0.79
13× cheaper
Llama 3.1 70B (Instruct) is cheaper on both — 2.1× input, 13× output
Writing DNA
Style Comparison
Similarity
51%
GPT-5.1 uses 61.2x more headings
GPT-5.1
Llama 3.1 70B (Instruct)
62%Vocabulary51%
19wSentence Length18w
0.29Hedging0.46
3.5Bold3.4
7.2Lists5.6
0.00Emoji0.00
0.61Headings0.00
0.03Transitions0.06
Based on 14 + 15 text responses
Research
What we learned reading every model
FAQ
