On May 16, 2025, OpenAI launched Codex, a new AI-powered coding agent designed to perform multiple software engineering tasks autonomously. Available in research preview for ChatGPT Pro, Enterprise, and Team users, Codex aims to boost developer productivity by running in a secure cloud sandbox and handling real-world programming tasks with minimal input.

BulletsIn

• Codex launched by OpenAI on May 16, 2025, under research preview
• Automates coding tasks like writing features, fixing bugs, running tests
• Operates in a secure cloud sandbox using user’s codebase as context
• Accessible via ChatGPT sidebar for Pro, Enterprise, Team users
• Powered by codex-1 model, optimized for real-world coding workflows
• Developers can guide Codex with custom AGENTS.md instructions
• Provides terminal logs and test outputs for full traceability
• Outperforms o3 model on SWE-bench benchmarks
• Free for now; flexible pricing and rate limits to apply later
• Codex CLI also available for macOS/Linux with local execution