Claude Opus 4.1 vs Claude Sonnet 3.5 v2
Claude Sonnet 3.5 v2 is more cost-effective, Claude Opus 4.1 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Opus 4.1
Vertex (Anthropic)
200K tokens context • $15.00 / $75.00 per 1M tokens
View full specifications →Claude Sonnet 3.5 v2
Vertex (Anthropic)
200K tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Opus 4.1
Claude Sonnet 3.5 v2
Provider
Vertex (Anthropic)
Vertex (Anthropic)
Context Window
200K tokens
200K tokens
Max Output Tokens
32K tokens
8K tokens
Input Pricing (per 1M tokens)
$15.00
$3.00
Output Pricing (per 1M tokens)
$75.00
$15.00
Release Date
Aug 2025
Oct 2024
Capabilities
Capability
Claude Opus 4.1
Claude Sonnet 3.5 v2
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Opus 4.1 if:
- • You need advanced reasoning
Choose Claude Sonnet 3.5 v2 if:
- • Cost efficiency is a priority