Codex CLI vs. OpenBlock

Feature	Codex CLI	OpenBlock

Tagline	Lightweight coding agent that runs in your terminal	A self-improving coding agent that handles the full dev lifecycle
Website	https://openai.com/codex	https://openblocklabs.com/
Language	rust	typescript
Release Date	April 30, 2025	March 16, 2026
Last Updated	June 3, 2026	May 14, 2026
Provider Type	AI Lab	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	deep	deep
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	VS Code, Zed (via ACP)	None - Terminal onle
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
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-5.5, GPT-5.4, GPT-5.4 pro, GPT-5.3-Codex, optional custom models.	400+ via OpenRouter (Claude, GPT, Gemini, Grok, open-source)
Pricing Model	Subscription	Freemium
Free Tier	No	Yes
Price Range	$20-200/mo	$10-100 (credit-based)
Source Code Availability	Open Source (Apache-2.0)	Proprietary Software
Source Code	https://github.com/openai/codex	N/A
Development State	active	active