Claude Sonnet 3.5 v2 vs Claude Sonnet 4
Claude Sonnet 4 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Sonnet 3.5 v2
Vertex (Anthropic)
200K tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Claude Sonnet 4
Vertex (Anthropic)
200K tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Sonnet 3.5 v2
Claude Sonnet 4
Provider
Vertex (Anthropic)
Vertex (Anthropic)
Context Window
200K tokens
200K tokens
Max Output Tokens
8K tokens
64K tokens
Input Pricing (per 1M tokens)
$3.00
$3.00
Output Pricing (per 1M tokens)
$15.00
$15.00
Release Date
Oct 2024
May 2025
Capabilities
Capability
Claude Sonnet 3.5 v2
Claude Sonnet 4
Text Generation
Vision
Function Calling
File Attachments
Advanced Reasoning
Which Model Should You Choose?
Choose Claude Sonnet 3.5 v2 if:
Choose Claude Sonnet 4 if:
- • You need advanced reasoning