Aider vs. Codex CLI

Feature	Aider	Codex CLI

Tagline	AI pair programming in your terminal	Lightweight coding agent that runs in your terminal
Website	https://aider.chat	https://openai.com/codex
Language	python	rust
Release Date	July 8, 2023	April 30, 2025
Last Updated	April 28, 2026	June 3, 2026
Provider Type	Independent	AI Lab
MCP Support	No	Yes
Multi-Agent Support	No	Yes
Git Integration	deep	deep
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	No	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	Yes
IDE Integration	VS Code, Neovim, Emacs	VS Code, Zed (via ACP)
Hooks / Extensions	Yes	Yes
Web Search	No	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent
Terminal Bench 2.0		#6 · 82.0% ±2.2 ²
Supported Models	Claude Sonnet 4.5/4.6, Claude Opus 4.5/4.6, GPT-5.4, GPT-4o, DeepSeek, Gemini, Llama, Qwen	All frontier GPT, Codex models: GPT-5.5, GPT-5.4, GPT-5.4 pro, GPT-5.3-Codex, optional custom models.
Pricing Model	BYOK	Subscription
Free Tier	Yes	No
Price Range	Free (BYOK)	$20-200/mo
Source Code Availability	Open Source (Apache-2.0)	Open Source (Apache-2.0)
Source Code	https://github.com/Aider-AI/aider	https://github.com/openai/codex
Development State	active	active