Claude Sonnet 4 vs Claude 4.5 Sonnet
Claude 4.5 Sonnet includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude 4.5 Sonnet
Cortecs
200K tokens context • $3.26 / $16.30 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Sonnet 4
Claude 4.5 Sonnet
Provider
Cortecs
Cortecs
Context Window
200K tokens
200K tokens
Max Output Tokens
64K tokens
200K tokens
Input Pricing (per 1M tokens)
$3.31
$3.26
Output Pricing (per 1M tokens)
$16.54
$16.30
Release Date
May 2025
Sep 2025
Capabilities
Capability
Claude Sonnet 4
Claude 4.5 Sonnet
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Sonnet 4 if:
Choose Claude 4.5 Sonnet if:
- • Cost efficiency is a priority
- • You need advanced reasoning