OpenAI's cloud and CLI coding agent

Launched in 2025

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ComplexityIntermediate

Origin

🇺🇸United States

Ideal for

FreelancersStartupsSmall businessesMedium businessesMid-cap companiesLarge enterprises

ComplexityIntermediate

Origin

🇺🇸United States

Ideal for

FreelancersStartupsSmall businessesMedium businessesMid-cap companiesLarge enterprises

About OpenAI Codex

Strengths

Codex Web: autonomous cloud agent with native parallelism
Open source and extensible Codex CLI
IDE extension for VS Code and other editors
Specialized GPT-5 models for code
3x more token-efficient than competitors
GitHub integrations (code review, Slack)
Secure sandboxed environments
Included in ChatGPT Plus subscription

Limitations

Requires ChatGPT subscription (Plus minimum)
Variable quality depending on task complexity
OpenAI ecosystem dependency
Codex Web limited to 1-30 min tasks
Lower SWE-bench score than Claude Code (~49%)

Features

Code Completion

Inline AI Chat

Autonomous Agent Mode

Multi-File Editing

Terminal Integration

Git Integration

AI Code Review

AI-Assisted Debugging

MCP Support

Open Source

Multi-Model Support

Remote / Mobile Control

Real-Time Collaboration

Pricing

Free

Limited Codex Web and CLI access
50 premium requests/month
2,000 completions/month
Base models

User reviews

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Articles mentioning OpenAI Codex

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Codex for Open Source: OpenAI Offers 6 Months of Free ChatGPT Pro to Open Source Maintainers

News

Mar 6, 2026

Codex for Open Source: OpenAI Offers 6 Months of Free ChatGPT Pro to Open Source Maintainers

OpenAI expands its Codex for Open Source program: 6 months of ChatGPT Pro with Codex, conditional access to Codex Security, and API credits for open source project maintainers. A $1 million fund to support the ecosystem.

Codex Security: OpenAI Launches an AI Agent to Hunt Vulnerabilities in Your Code

News

Mar 6, 2026

Codex Security: OpenAI Launches an AI Agent to Hunt Vulnerabilities in Your Code

OpenAI unveils Codex Security, an application security agent that builds a threat model of your project, identifies critical vulnerabilities, and proposes contextual fixes. 14 CVEs discovered in major open source projects including OpenSSH, GnuTLS, and Chromium.

OpenAI Is Building Its Own Code Platform to Replace GitHub: The Microsoft Breakup Accelerates

News

Mar 5, 2026

OpenAI Is Building Its Own Code Platform to Replace GitHub: The Microsoft Breakup Accelerates

Repeated GitHub outages pushed OpenAI to build its own code platform. Behind the technical decision lies a strategic message to Microsoft: the dependency is over.

OpenAI Raises $110 Billion: Historic Record, Massive Losses, and the Road to One Trillion

News

Feb 27, 2026

OpenAI Raises $110 Billion: Historic Record, Massive Losses, and the Road to One Trillion

OpenAI closes the largest private funding round in history: $110 billion from Amazon, Nvidia and SoftBank. But behind this record lies a $14 billion annual loss. Full analysis.

View all articles

Ready to try OpenAI Codex?

Discover all features and start using OpenAI Codex today.

Quick info

Price

Freemium

Starting from 19€/mo

OpenAI Codex

About OpenAI Codex

Features

Pricing

User reviews

Compare OpenAI Codex

Popular comparisons

Frequently asked questions about OpenAI CodexFAQ

How much does OpenAI Codex cost?

Is Codex open source?

What is the difference between Codex Web and Codex CLI?

Codex vs Claude Code: which to choose?

Can Codex be used for free?

What models does Codex use?

Other tools by OpenAI

Articles mentioning OpenAI Codex

Codex for Open Source: OpenAI Offers 6 Months of Free ChatGPT Pro to Open Source Maintainers

Codex Security: OpenAI Launches an AI Agent to Hunt Vulnerabilities in Your Code

OpenAI Is Building Its Own Code Platform to Replace GitHub: The Microsoft Breakup Accelerates

OpenAI Raises $110 Billion: Historic Record, Massive Losses, and the Road to One Trillion

Ready to try OpenAI Codex?

About OpenAI Codex

Features

Pricing

User reviews

Compare OpenAI Codex

Popular comparisons

Frequently asked questions about OpenAI CodexFAQ

How much does OpenAI Codex cost?

Is Codex open source?

What is the difference between Codex Web and Codex CLI?

Codex vs Claude Code: which to choose?

Can Codex be used for free?

What models does Codex use?

Other tools by OpenAI

Articles mentioning OpenAI Codex

Codex for Open Source: OpenAI Offers 6 Months of Free ChatGPT Pro to Open Source Maintainers

Codex Security: OpenAI Launches an AI Agent to Hunt Vulnerabilities in Your Code

OpenAI Is Building Its Own Code Platform to Replace GitHub: The Microsoft Breakup Accelerates

OpenAI Raises $110 Billion: Historic Record, Massive Losses, and the Road to One Trillion

Ready to try OpenAI Codex?