Claude Sonnet 3.5 vs Claude Opus 4
Claude Opus 4 includes advanced reasoning. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Detailed Comparison
Specification
Claude Sonnet 3.5
Claude Opus 4
Provider
GitHub Copilot
GitHub Copilot
Context Window
90K tokens
80K tokens
Max Output Tokens
8K tokens
16K tokens
Release Date
Oct 2024
May 2025
Capabilities
Capability
Claude Sonnet 3.5
Claude Opus 4
Text Generation
Vision
Function Calling
File Attachments
Advanced Reasoning
Which Model Should You Choose?
Choose Claude Sonnet 3.5 if:
- • You need a larger context window
Choose Claude Opus 4 if:
- • You need advanced reasoning