openai-codex

What it does

OpenAI Codex is an advanced AI technology that generates code from natural language prompts. Learn about its capabilities, recent developments, and applications in software development.

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  Codex by OpenAI2021 · openai.com · ▲955

  AI that writes code for you

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  Codex by OpenAIFeb 2026 · openai.com · ▲346

  A command center for working with agents

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  CodeX-Editor2025 · ▲125

  A web code editor with AI & multi-language support

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  GPT-5 CodexSep 2025 · ▲358

  A version of GPT-5 better at agentic coding

• OC
  Open Codex – OpenAI Codex CLI with open-source LLMs2025 · github.com · ▲106

  Hey HN, I’ve built Open Codex, a fully local, open-source alternative to OpenAI’s Codex CLI. My initial plan was to fork their project and extend it. I even started doing that. But it turned out their code has several leaky abstractions, which made it hard to override core behavior cleanly. Shortly after, OpenAI introduced breaking changes. Maintaining my customizations on top became increasingly difficult. So I rewrote the whole thing from scratch using Python. My version is designed to support local LLMs. Right now, it only works with phi-4-mini (GGUF) via…

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