Codex CLI

Codex CLI

OpenAI
+
+

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About

Codex CLI is an open-source, lightweight coding agent that integrates directly into your terminal, designed to help developers write, edit, and understand code efficiently. By pairing with Codex CLI, developers can leverage the power of AI to streamline their workflow, get real-time code suggestions, and improve their coding accuracy, all from within their command line interface. It provides a seamless, accessible way to enhance coding productivity while staying in the environment developers are already comfortable with.

About

Kilo Code is a powerful open-source coding agent designed to help developers build, ship, and iterate faster across every stage of the software development workflow. It offers multiple modes—including Ask, Architect, Code, Debug, and Orchestrator—so developers can switch seamlessly between tasks with tailored AI support. The platform includes features such as hallucination-free code, automatic failure recovery, and deep context awareness to ensure accuracy and reliability. Developers can run parallel agents, enjoy fast autocomplete, and even deploy applications with a single click. With access to 500+ models and integration across terminals, VS Code, and JetBrains editors, Kilo provides unmatched flexibility. As the #1 agent on OpenRouter with over 750,000 users, it has quickly become a preferred choice for modern AI-assisted development.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Codex CLI is ideal for developers and software engineers looking to enhance their coding efficiency, automate repetitive tasks, and improve code quality using AI-powered assistance directly within their command line environment

Audience

Kilo Code is ideal for developers and engineering teams seeking a fast, accurate, open-source AI coding agent that enhances every stage of the software development lifecycle.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Open source
Free Version Supported
Free Trial Not Supported

Pricing

$15/user/month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

Reviews/Ratings

Overall 5.0 / 5
ease 4.0 / 5
features 5.0 / 5
design 4.0 / 5
support 4.0 / 5

Pros & Cons from Real Users

Pros

  • Codex CLI is great because it brings OpenAI’s coding agent directly into the terminal. I like that it fits into a normal developer workflow instead of forcing everything through a separate web app or IDE extension. It can read, modify, and work with code locally, which makes it useful for debugging, refactoring, exploring a repo, and handling coding tasks without leaving the command line. That is especially nice for developers who already live in terminal-first workflows. I also like that it is part of the broader Codex ecosystem. If I want the same general agent experience in an IDE, desktop app, or ChatGPT’s cloud-based Codex, there are options for that too.

Cons

  • I would still supervise it closely. Any AI coding agent that can touch local files and interact with a dev environment needs review, tests, and clear boundaries. It can also run into the usual coding-agent issues: setup problems, API/config errors, terminal quirks, command failures, and tool-use mistakes. A recent empirical study of Claude Code, Codex, and Gemini CLI found that many reported bugs in these tools involve functionality, integrations, configuration, terminal behavior, and command execution.

Pros & Cons from Real Users

Pros

  • Ridiculously easy onboarding, slick UI, hyper-contextual code suggestions, smart refactoring, one-click docs generation, full-stack architecture templates, seamless VS Code integration . Feels like a senior architect whispering best practices in your ear while the whole squad’s velocity goes full turbo.

Cons

  • Tends to over-engineer fixes on legacy code, needs high-speed internet for real-time inference, and the AI occasionally hallucinates exotic patterns that require manual cleanup.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

Kilo Code
Founded: 2025
United States
kilo.ai/

Alternatives

Amp

Amp

Amp Code

Alternatives

JetBrains Junie

JetBrains Junie

JetBrains
Amp

Amp

Amp Code
Claude Code

Claude Code

Anthropic
Claude Code

Claude Code

Anthropic
Poolside

Poolside

Poolside.ai

Categories

Agentic AI Supported
AI Agents Supported
AI Code Generators Supported
AI Coding Agents Supported

Categories

Agentic AI Supported
AI Agents Supported
AI Code Generators Supported
AI Coding Agents Supported

Integrations

Constellation Supported
Spawn Supported
Adios.dev Supported
Agentation Supported
Bash Supported
GPT-5.1 Instant Supported
GPT-5.1 Pro Supported
GPT-5.1-Codex Supported
GPT-5.2 Supported
GitHub Supported
Go Supported
Google Cloud Platform Not Supported
HTML Supported
Laguna S 2.1 Not Supported
MiMo-V2.5 Not Supported
OpenAI Supported
Prooflive.ai Supported
Seed2.0 Pro Not Supported
Seed2.1 Pro Not Supported
SuperBased Not Supported

Integrations

Constellation Supported
Spawn Supported
Adios.dev Not Supported
Agentation Not Supported
Bash Not Supported
GPT-5.1 Instant Not Supported
GPT-5.1 Pro Not Supported
GPT-5.1-Codex Not Supported
GPT-5.2 Not Supported
GitHub Not Supported
Go Not Supported
Google Cloud Platform Supported
HTML Not Supported
Laguna S 2.1 Supported
MiMo-V2.5 Supported
OpenAI Not Supported
Prooflive.ai Not Supported
Seed2.0 Pro Supported
Seed2.1 Pro Supported
SuperBased Supported
Claim Codex CLI and update features and information
Claim Codex CLI and update features and information
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