Claude Sonnet 4.5 vs Claude Opus 4
Compare Claude Sonnet 4.5 by GitHub Copilot and Claude Opus 4 by GitHub Copilot. See detailed specifications, pricing, and capabilities side-by-side.
Quick Overview
Claude Sonnet 4.5
GitHub Copilot
128K tokens context • Pricing not available
View full specifications →Detailed Comparison
Specification
Claude Sonnet 4.5
Claude Opus 4
Provider
GitHub Copilot
GitHub Copilot
Context Window
128K tokens
80K tokens
Max Output Tokens
16K tokens
16K tokens
Release Date
Sep 2025
May 2025
Capabilities
Capability
Claude Sonnet 4.5
Claude Opus 4
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose Claude Sonnet 4.5 if:
- • You need a larger context window