Llama 3.1 405B vs GPT-1
Compare Llama 3.1 405B by Meta AI against GPT-1 by OpenAI, context windows of 128K vs 1K, tested across 3 shared challenges. Updated May 2026.
Which is better, Llama 3.1 405B or GPT-1?
Llama 3.1 405B and GPT-1 are both competitive models. Context windows: 128K vs 1K tokens. Compare their real outputs side by side below.
Key Differences Between Llama 3.1 405B and GPT-1
Llama 3.1 405B is made by meta while GPT-1 is from openai. Llama 3.1 405B has a 128K token context window compared to GPT-1's 1K.
API pricing
Per 1M tokens
Llama 3.1 405B
Input
$2.70
Output
$3.10
GPT-1
Input
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Output
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Our Verdict
Llama 3.1 405B
GPT-1Runner-up
No community votes yet. On paper, Llama 3.1 405B has the edge — bigger model tier, newer, bigger context window.
Slight edge
Writing DNA
Style Comparison
Similarity
68%
Llama 3.1 405B uses 2.9x more emoji
Llama 3.1 405B
GPT-1
56%Vocabulary65%
15wSentence Length14w
0.41Hedging0.27
0.0Bold0.0
1.9Lists0.3
0.03Emoji0.00
0.00Headings0.00
0.16Transitions0.41
Based on 5 + 7 text responses
FAQ
