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 March 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.

Our Verdict
Llama 3.1 405B
Llama 3.1 405B
GPT-1
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
100%

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
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Llama 3.1 405BGPT-1
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