Llama 3.1 405B vs Gemini 2.5 Pro Preview 06-05

Compare Llama 3.1 405B by Meta AI against Gemini 2.5 Pro Preview 06-05 by Google AI, context windows of 128K vs 1.0M, tested across 6 shared challenges. Updated April 2026.

Which is better, Llama 3.1 405B or Gemini 2.5 Pro Preview 06-05?

Llama 3.1 405B and Gemini 2.5 Pro Preview 06-05 are both competitive models. Llama 3.1 405B costs $2.7/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 128K vs 1049K tokens. Compare their real outputs side by side below.

Key Differences Between Llama 3.1 405B and Gemini 2.5 Pro Preview 06-05

Llama 3.1 405B is made by meta while Gemini 2.5 Pro Preview 06-05 is from google. Llama 3.1 405B has a 128K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, Llama 3.1 405B costs $2.7/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05.

Our Verdict
Gemini 2.5 Pro Preview 06-05
Gemini 2.5 Pro Preview 06-05
Llama 3.1 405B
Llama 3.1 405BRunner-up

No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 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
Writing DNA

Style Comparison

Similarity
72%

Gemini 2.5 Pro Preview 06-05 uses 482.5x more bold

Llama 3.1 405B
Gemini 2.5 Pro Preview 06-05
56%Vocabulary51%
15wSentence Length15w
0.41Hedging0.31
0.0Bold4.8
1.9Lists4.1
0.03Emoji0.00
0.00Headings0.98
0.16Transitions0.05
Based on 5 + 20 text responses
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Llama 3.1 405BGemini 2.5 Pro Preview 06-05

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