Claude Sonnet 4.5 vs Claude Opus 4.1
Claude Sonnet 4.5 offers 1.0M tokens context vs 200K tokens, Claude Sonnet 4.5 is more cost-effective. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Sonnet 4.5
OpenCode Zen
1.0M tokens context • $3.00 / $15.00 per 1M tokens
View full specifications →Claude Opus 4.1
OpenCode Zen
200K tokens context • $15.00 / $75.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
Claude Sonnet 4.5
Claude Opus 4.1
Provider
OpenCode Zen
OpenCode Zen
Context Window
1.0M tokens
200K tokens
Max Output Tokens
64K tokens
32K tokens
Input Pricing (per 1M tokens)
$3.00
$15.00
Output Pricing (per 1M tokens)
$15.00
$75.00
Release Date
Sep 2025
Aug 2025
Capabilities
Capability
Claude Sonnet 4.5
Claude Opus 4.1
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
- • Cost efficiency is a priority