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Claude 3.5 Sonnet vs Claude Sonnet 4: Pricing, Benchmarks & Verdict (2026)

Pricing verified Apr 8, 2026

⚡ Quick Answer

Compare Claude 3.5 Sonnet and Claude Sonnet 4 across pricing, benchmarks, and capabilities.

Updated: April 8, 2026 · ✓ Pricing verified

Side-by-Side Comparison

FeatureClaude 3.5 SonnetClaude Sonnet 4
ProviderAnthropicAnthropic
Input Price / 1M tokens$3.00$3.00
Output Price / 1M tokens$15.00$15.00
Context Window
200K
200K
Max Output Tokens
8,192
64,000
Arena ELO
1,270
1,280
Coding ELO
1,300
1,305
TTFT (ms)
150
320
Tokens/sec
100
78
MultimodalYesYes
JSON ModeYesYes
Function CallingYesYes
VisionNoYes
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 Claude Sonnet 4

Claude Sonnet 4 excels at coding, analysis, long-context, agents tasks.

Strengths:

  • Best-in-class coding performance
  • 200K context window
  • Excellent instruction following

Best for:

codinganalysislong-contextagents

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