Coding AssistantsOpen Source

OpenAI Codex CLI

OpenAI's open-source terminal agent for autonomous coding tasks

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About

OpenAI Codex CLI is an open-source terminal agent that applies natural language instructions to your local codebase. Running in your terminal, it reads files, writes code, runs tests, and iterates until the task is complete — powered by OpenAI's o4-mini model.

Choose OpenAI Codex CLI when…

  • •using OpenAI models and want a terminal coding agent
  • •prefer open-source with full control over the agent loop
  • •need to integrate with existing OpenAI API infrastructure

Builder Slot

Who runs your terminal tasks?Optional for most stacks

A CLI agent you direct to handle multi-step coding tasks autonomously

Dev Tools
Recommended
App Infra
Not applicable
Hybrid
Optional

Other tools in this slot:

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Stack Genome Detection

AIchitect's Genome scanner detects OpenAI Codex CLI in your project via these signals:

npm packages
@openai/codex
env vars
OPENAI_API_KEY

Integrates with (1)

WarpCoding Assistants
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Alternatives to consider (2)

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Pricing

Pay-as-you-goOpenAI API tokens

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OpenAI Codex CLI on AIchitect[![OpenAI Codex CLI](https://aichitect.dev/badge/tool/codex-cli)](https://aichitect.dev/tool/codex-cli)

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