OpenAI Codex CLI

Name: OpenAI Codex CLI
Rating: 5.0 (31 reviews)

Frontier reasoning in the terminal

5.0•31 reviews•

427 followers

Frontier reasoning in the terminal

5.0•31 reviews•

427 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

Launch Team / Built With

Topview Motion StudioGet a launch video for about $3, not thousands

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Osaurus

Hunter

📌

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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6mo 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 31 reviews

Review OpenAI Codex CLI?

Reviewers—mostly founders building developer tools—describe OpenAI Codex CLI as a strong terminal-native coding agent that speeds up real repo work, especially multi-file refactors, debugging, prototyping, and tight edit-test loops. Makers of Zencoder, Vokal, and Vamah.ai say they use it as core infrastructure or workflow glue, while others praise sandboxing, approvals, and repo-aware execution. The only recurring caveat is fit: several reviewers pair it with Claude Code or add orchestration layers, and one says it is 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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