GPT-5-Codex vs Claude Opus 4
Compare GPT-5-Codex by GitHub Copilot and Claude Opus 4 by GitHub Copilot. See detailed specifications, pricing, and capabilities side-by-side.
Quick Overview
Detailed Comparison
Specification
GPT-5-Codex
Claude Opus 4
Provider
GitHub Copilot
GitHub Copilot
Context Window
128K tokens
80K tokens
Max Output Tokens
64K tokens
16K tokens
Release Date
Sep 2025
May 2025
Capabilities
Capability
GPT-5-Codex
Claude Opus 4
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