Codex CLI vs. Prime Agent

Feature	Codex CLI	Prime Agent

Tagline	Lightweight coding agent that runs in your terminal	Model-agnostic terminal coding agent built on a persistent IPython runtime
Website	https://openai.com/codex	https://www.primeintellect.ai/blog/prime-agent
Language	rust	typescript
Release Date	April 30, 2025	May 8, 2026
Last Updated	June 29, 2026	September 4, 2026
Provider Type	AI Lab	AI Lab
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	deep	basic
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	No
Sandbox / Permissions	Yes	No
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	VS Code, Zed (via ACP)	Zed, VS Code (via ACP)
Hooks / Extensions	Yes	Yes
Web Search	Yes	No
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent
Terminal Bench 2.0	#6 · 82.0% ±2.2 ¹
Supported Models	All frontier GPT, Codex models: GPT-5.6 Sol / Terra / Luna, GPT-5.5, GPT-5.4 pro, GPT-5.3-Codex, optional custom models.	20+ providers: Claude, GPT, Gemini, Mistral, Groq, Cerebras, xAI, DeepSeek, MiniMax, Xiaomi MiMo, Bedrock, Ollama, vLLM, LM Studio
Supported Subscriptions	ChatGPT	ChatGPT Claude Code GitHub Copilot
Pricing Model	Subscription	Free, Subscription, BYOK
Free Tier	No	Yes
Price Range	$20-200/mo	Free (BYOK)
Source Code Availability	Open Source (Apache-2.0)	Open Source (MIT)
Source Code	https://github.com/openai/codex	https://github.com/PrimeIntellect-ai/prime-agent
Development State	active	active