OpenAI Codex

Name: OpenAI Codex
Price: 20 USD
Author: OpenAI

★4.0/ 5

by OpenAI

MCPEditorial review

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Cloud-based AI software engineering agent that runs multi-step coding tasks autonomously in parallel — writing features, fixing bugs, running tests, and filing PRs across real repositories.

OpenAI Codex is a full-stack software engineering agent launched in May 2025 and significantly expanded through 2026. It runs in isolated cloud sandboxes preloaded with your GitHub repository and can handle complex, long-running tasks end to end — writing features, fixing bugs, refactoring, running tests, and filing PRs for human review. Codex now supports multi-agent workflows where parallel agents work simultaneously in isolated git worktrees, coordinated from a desktop app for macOS and Windows. The in-app browser lets Codex interact with local and web pages directly. Computer use enables Codex to control macOS apps autonomously — clicking, typing, and navigating native interfaces. Persistent memory retains context across sessions. Powered by GPT-5.4 (default as of March 2026) with 1M token context. 90+ plugin integrations including GitLab, CodeRabbit, Slack, and Google Calendar. Codex Security launched in March 2026 as an autonomous vulnerability scanning agent. 3M+ weekly active users. Available to ChatGPT Pro, Business, and Enterprise plans.

Pricing

subscription · $20

Segment

b2b

Setup

moderate

Verified

May 2, 2026

Capabilities

agentic-codingmulti-file-editingterminal-agentgit-nativeautonomouscode-generationworkflow-builder

Pros & Limitations

Editorial assessment

Pros

✓Multi-agent parallel execution in isolated git worktrees
✓Computer use — controls macOS apps autonomously
✓GPT-5.4 with 1M token context for large codebases
✓90+ plugin integrations including GitLab, Slack, Google Calendar
✓Codex Security agent for autonomous vulnerability scanning
✓3M+ weekly active users — largest coding agent community

Limitations

⚠Requires ChatGPT Pro, Business, or Enterprise plan — no free tier
⚠Computer use not available in EEA, UK, or Switzerland
⚠Best suited for well-scoped tasks — complex ambiguous work still needs human steering
⚠Cloud-only execution — no local deployment option

Technical Details

Deployment

cliwebapi

Model architectureGPT-5.4 (default), GPT-5.4-mini, GPT-5.3-Codex

Avg setup time< 15 minutes for ChatGPT Pro users (sign in, connect GitHub repo, submit first task to Codex cloud)

Autonomous rateConfigurable: Codex runs autonomous multi-step coding tasks in cloud sandboxes; developers review and approve PRs before merging. 3M+ weekly active users.

MCP compatibleYes

Integrations

GitHubGitLabVS CodeJetBrainsXcodeEclipseSlackGoogle CalendarCodeRabbitMCP

Security

SOC 2 Type IIGDPR