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Llama 3.1 405B

Complete specs, pricing, and benchmark data for Llama 3.1 405B by Meta. Last verified 2026-04-20.

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Pricing

Input / 1M tokens

$3.00

Output / 1M tokens

$3.00

Context & Output

Context Window

128K

Max Output

4,096

TTFT

150ms

Speed

100 tok/s

Benchmarks

Arena ELO

1240

Coding ELO

1200

Reasoning ELO

1250

HumanEval

89.5

MMLU

85.9

MATH

112

GPQA

45

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Price History (Input $/M tokens)

Strengths
  • +Largest open model
  • +Excellent reasoning
  • +High quality outputs
Limitations
  • -Expensive for inference
  • -Slow token throughput

Best For

General PurposeReasoningLong Context

Compare Llama 3.1 405B with...

vs Claude Opus 4vs Gemini 2.5 Provs o3vs DeepSeek R1vs o1vs Qwen 3 235B MoEvs Gemini Experimental 1206vs GPT-4.5vs DeepSeek R1 (Groq)vs Llama 4 Maverickvs DeepSeek R1 (Together)vs Grok 3
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