OpenAI Codex — AI Tool Review, Features & Pricing

OpenAI Codex: OpenAI's cloud-based AI software engineering agent, now powered by GPT-5.5-Codex with 1M token context. Runs multiple tasks in parallel in isolated sandboxes with your repo preloaded. Available as CLI, macOS app, IDE extensions (VS Code, Cursor, Windsurf), web interface, and Slack integration. GPT-5.5-Codex scores 82.7% on Terminal-Bench 2.0 and 58.6% on SWE-Bench Pro.

About OpenAI Codex

OpenAI's cloud-based AI software engineering agent, now powered by GPT-5.5-Codex with 1M token context. Runs multiple tasks in parallel in isolated sandboxes with your repo preloaded. Available as CLI, macOS app, IDE extensions (VS Code, Cursor, Windsurf), web interface, and Slack integration. GPT-5.5-Codex scores 82.7% on Terminal-Bench 2.0 and 58.6% on SWE-Bench Pro.

It belongs to the development category (subcategory: ai-coding) within the AI Workflows tool directory.

OpenAI Codex offers a freemium model with a free tier and paid upgrades.

Pricing & Plans

  • Pricing model: Freemium
  • Plan details: Limited-time free access for ChatGPT Free and Go users. Included with Plus ($20/month) and Pro ($200/month) plans. Business, Enterprise, and Edu plans also include Codex. Each task runs in isolated cloud sandbox.

Available Models in OpenAI Codex

  • GPT-5.5-Codex
  • GPT-5.5
  • GPT-5.4
  • GPT-5.3-Codex

Key Capabilities

  • code-generation
  • agent-mode
  • code-review
  • task-automation
  • pull-requests
  • debugging

Tags & Keywords

coding, autonomous, cloud-agent, sandbox, pull-requests, multi-agent, cli, macos-app, ide-extension, agentic

How to access OpenAI Codex

Visit the official OpenAI Codex website: https://openai.com/codex/.

Find more AI tools like OpenAI Codex on our AI Tools Directory, explore complete AI Workflows that combine multiple tools, or read in-depth reviews on our AI Blog.

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