GPT-5 Codex

OpenAI · Multimodal · Released Sep 2025

GPT-5 Codex is OpenAI's code-focused model with a 400k token context window, built for software development and code generation tasks.

Strengths: Excels at code generation, debugging, and understanding large codebases through its extended context window.
Best for: Software development workflows where understanding and generating code across large files or multiple files is needed.
Limitations: Specialized for code tasks; GPT-5 Pro or GPT-5.5 would be better suited for general-purpose reasoning beyond software development.

Input / 1M

$1.25

Output / 1M

$10.00

Cached input / 1M

$0.125

Context window

Price history

Effective	Input	Output	Cached in	Note	Source
11 Jun 2026	$1.25	$10.00	$0.125	Imported from OpenRouter	openrouter.ai

GPT-5.6 Luna

in $0.5 · out $3.00

GPT-5.6 Terra

in $1.25 · out $7.50

GPT-5.6 Sol

in $5.00 · out $30.00

GPT-5.5 Pro

in $30.00 · out $180.00

Data updated Jul 16, 2026 Report a problem