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OpenAI Codex

Code Development
Agentic AI
OpenAI

Autonomous AI software engineering agent powered by GPT-5-Codex. Works in terminal, IDE, GitHub, or ChatGPT. Can spend seconds to hours on complex tasks with dynamic thinking. Operates in secure cloud containers, achieving 75% accuracy on coding benchmarks.

Why Use OpenAI Codex

OpenAI's dedicated agentic coding system that handles complete engineering workflows. Trained specifically on real-world software tasks: building projects from scratch, adding features, debugging, refactoring, code reviews. 5% more accurate than o3 on coding tests. Available via ChatGPT Plus/Pro and GitHub Copilot.

Use Cases for Builders
Practical ways to use OpenAI Codex in your workflow
  • Build full features autonomously while you focus on product strategy
  • Debug complex production issues by analyzing logs and traces
  • Refactor legacy code with modern patterns and best practices
  • Review PRs and suggest improvements with context-aware feedback
  • Set up CI/CD pipelines and deployment configurations
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