OpenAI Codex CLI

Name: OpenAI Codex CLI
Rating: 5.0 (32 reviews)

Frontier reasoning in the terminal

5.0•32 reviews•

465 followers

Frontier reasoning in the terminal

5.0•32 reviews•

465 followers

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For developers who live in the terminal and want ChatGPT‑level reasoning plus the power to actually run code, manipulate files, and iterate – all under version control. In short, it’s chat‑driven development that understands and executes your repo.

Free

Launch tags:Open Source•Developer Tools•GitHub

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Framer AI AgentsDesign and publish professional sites with AI

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Osaurus

Hunter

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OpenAI's answer to Claude Code.

Not be confused with Codex CLI by Microsoft, nor OpenAI Codex, which was launched in 2021!

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1yr ago

This sounds like a seriously powerful tool for devs who live in the terminal. Combining ChatGPT-level reasoning with real execution, file manipulation, and version control could really streamline workflows. Excited to see how this evolves for hands-on coding environments!

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1yr ago

Codex keeps shipping new features, but compared to Claude Code's CLI agent, it still lacks that "let the agent handle it" autonomy for multi-step tasks. Hope the team closes the gap soon — healthy competition benefits all developers.

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7mo ago

I thought it would be a code editor like Cursor.

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1yr ago

Osaurus

Hunter

@axindie they might just buy Windsurf instead. For $3B.

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1yr ago

I appreciate the CLI integration for devs! 😄

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1yr ago

5.0

Based on 32 reviews

Review OpenAI Codex CLI?

Reviewers are uniformly positive, though the feedback comes almost entirely from founders describing their own workflows rather than broader user reviews. They say Codex CLI fits terminal-first development well, especially for repo-aware editing, multi-file refactors, debugging, testing, and fast iteration inside a real codebase. Makers of Zencoder, Vokal, and Fabraix highlight orchestration, team workflows, consistent diffs, and long-running tasks. A small caveat appears in comparisons: some founders pair it with other agents for deeper reasoning or reviews, and one notes it can be precise but not especially fast.

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I chose Codex CLI because I wanted an AI development tool that could work directly inside the real codebase rather than only generate isolated snippets in a chat window. Mnemcore spans a Vue 3 frontend, FastAPI backend, Supabase/PostgreSQL database, pgvector retrieval, video infrastructure and OpenAI integrations. Codex CLI helped me reason across that entire system, inspect existing code, make coordinated changes and validate the results without constantly copying context between tools. I used it to build Mnemcore end to end—from database migrations and API endpoints to frontend workflows, retrieval logic and evaluation cases. It was especially useful when debugging failures that crossed multiple layers of the application or when simplifying architecture that had become overly complex. What stood out was not just code generation, but the ability to collaborate iteratively inside the repository. I could explain the product goal, review the implementation, test it, identify weaknesses and refine the approach in the same workflow. Codex CLI meaningfully increased what I could build as a solo founder and made it possible to move quickly without losing visibility into how the system actually worked.

OpenAI Codex CLI

Frontier reasoning in the terminal

Frontier reasoning in the terminal

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