LLMversus

Claude 3.5 Sonnet vs Llama 3.1 405B: Pricing, Benchmarks & Verdict (2026)

Pricing verified Sep 14, 2026By LLMversusUpdated September 17, 2026View methodology

⚡ Quick Answer

Compare Claude 3.5 Sonnet and Llama 3.1 405B across pricing, benchmarks, and capabilities.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureClaude 3.5 SonnetLlama 3.1 405B
ProviderAnthropicMeta
Input Price / 1M tokens$3.00$3.00
Output Price / 1M tokens$15.00$3.00
Context Window
200K
128K
Max Output Tokens
8,192
4,096
Arena ELO
1,270
1,240
Coding ELO
1,300
1,200
TTFT (ms)
150
150
Tokens/sec
100
100
MultimodalYesNo
JSON ModeYesYes
Function CallingYesYes
VisionNoNo
When to Use Claude 3.5 Sonnet

Claude 3.5 Sonnet excels at coding, general-purpose, multimodal tasks.

Strengths:

  • Best coding
  • Large context
  • Strong reasoning

Best for:

codinggeneral-purposemultimodal
When to Use Llama 3.1 405B

Llama 3.1 405B excels at general-purpose, reasoning, long-context tasks.

Strengths:

  • Largest open model
  • Excellent reasoning
  • High quality outputs

Best for:

general-purposereasoninglong-context

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