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

Compare OpenAI Codex

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Quick info

Price

Freemium

Starting from 19€/mo

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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%)

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

Ready to try OpenAI Codex?

Stay in the loop

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

Ready to try OpenAI Codex?