GPT-5-Codex vs Claude Opus 4.1
GPT-5-Codex offers 400K tokens context vs 200K tokens, GPT-5-Codex is more cost-effective. Compare full specs, pricing, and choose the best model for your use case.
Quick Overview
Claude Opus 4.1
OpenCode Zen
200K tokens context • $15.00 / $75.00 per 1M tokens
View full specifications →Detailed Comparison
Specification
GPT-5-Codex
Claude Opus 4.1
Provider
OpenCode Zen
OpenCode Zen
Context Window
400K tokens
200K tokens
Max Output Tokens
128K tokens
32K tokens
Input Pricing (per 1M tokens)
$1.25
$15.00
Output Pricing (per 1M tokens)
$10.00
$75.00
Release Date
Aug 2025
Aug 2025
Capabilities
Capability
GPT-5-Codex
Claude Opus 4.1
Text Generation
Vision
Function Calling
Advanced Reasoning
File Attachments
Which Model Should You Choose?
Choose GPT-5-Codex if:
- • You need a larger context window
- • Cost efficiency is a priority