Llama 3.1 405B vs Inception: Mercury

Compare Llama 3.1 405B by Meta AI against Inception: Mercury by Inception, context windows of 128K vs 32K, tested across 7 shared challenges. Updated April 2026.

Which is better, Llama 3.1 405B or Inception: Mercury?

Llama 3.1 405B and Inception: Mercury are both competitive models. Llama 3.1 405B costs $2.7/M input tokens vs $10/M for Inception: Mercury. Context windows: 128K vs 32K tokens. Compare their real outputs side by side below.

Key Differences Between Llama 3.1 405B and Inception: Mercury

Llama 3.1 405B is made by meta while Inception: Mercury is from inception. Llama 3.1 405B has a 128K token context window compared to Inception: Mercury's 32K. On pricing, Llama 3.1 405B costs $2.7/M input tokens vs $10/M for Inception: Mercury.

Our Verdict
Llama 3.1 405B
Llama 3.1 405B
Inception: Mercury
Inception: MercuryRunner-up

No community votes yet. On paper, Llama 3.1 405B has the edge — bigger model tier, bigger context window, major provider backing.

Llama 3.1 405B is 3.2x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
40%

Inception: Mercury uses 489.0x more bold

Llama 3.1 405B
Inception: Mercury
56%Vocabulary55%
15wSentence Length40w
0.41Hedging0.39
0.0Bold4.9
1.9Lists3.8
0.03Emoji0.04
0.00Headings1.04
0.16Transitions0.03
Based on 5 + 17 text responses
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Llama 3.1 405BInception: Mercury

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