Llama 3.1 405B vs GPT-4o mini

Compare Llama 3.1 405B by Meta AI against GPT-4o mini by OpenAI, context windows of 128K vs 128K, tested across 6 shared challenges. Updated March 2026.

Which is better, Llama 3.1 405B or GPT-4o mini?

Llama 3.1 405B and GPT-4o mini are both competitive models. Llama 3.1 405B costs $2.7/M input tokens vs $0.15/M for GPT-4o mini. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.

Key Differences Between Llama 3.1 405B and GPT-4o mini

Llama 3.1 405B is made by meta while GPT-4o mini is from openai. Llama 3.1 405B has a 128K token context window compared to GPT-4o mini's 128K. On pricing, Llama 3.1 405B costs $2.7/M input tokens vs $0.15/M for GPT-4o mini.

Our Verdict
Llama 3.1 405B
Llama 3.1 405B
GPT-4o mini
GPT-4o miniRunner-up

No community votes yet. On paper, Llama 3.1 405B has the edge — bigger model tier.

GPT-4o mini is 5.2x cheaper per token — worth considering if cost matters.

Too close to call
FAQ

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