Claude Sonnet 4.5 vs Claude Sonnet 3.5 v2
Claude Sonnet 4.5 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Sonnet 4.5
Anthropic
200K tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Claude Sonnet 3.5 v2
Anthropic
200K tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Sonnet 4.5
Claude Sonnet 3.5 v2
Provider
Anthropic
Anthropic
Context Window
200K tokens
200K tokens
Max Output Tokens
64K tokens
8K tokens
Input Pricing (per 1M tokens)
$3.00
$3.00
Output Pricing (per 1M tokens)
$15.00
$15.00
Release Date
Sep 2025
Oct 2024
Capabilities
Capability
Claude Sonnet 4.5
Claude Sonnet 3.5 v2
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Sonnet 4.5 if:
- • You need advanced reasoning