Alternatives

Products that do what openai-codex does

openai-codex

1
Codex by OpenAI▲955
AI that writes code for you
2021 · openai.com
2
Codex by OpenAI▲346
A command center for working with agents
Feb 2026 · openai.com
3
CodeX-Editor▲125
A web code editor with AI & multi-language support
2025
4
GPT-5 Codex▲358
A version of GPT-5 better at agentic coding
Sep 2025
5OC
Open Codex – OpenAI Codex CLI with open-source LLMs▲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…
2025 · github.com
6
CodeX▲124
Build webapps in minutes for completely free
2025
7
Codex CLI▲9
Codex-CLI
2025
8
Codex by ChatGPT▲401
Cloud agent for parallel dev tasks, powered by Codex-1
2025
9
Codex app for Windows▲145
Codex now runs natively on Windows with secure sandbox
Mar 2026 · learn.chatgpt.com
10
OpenCode Superapp▲128
The power of Codex with local, self-hosted models and voice
Jul 2026 · opencodesuper.app
11
Codex▲247
Discuss and understand your code base from within your IDE
2022
12
opencode▲395
Your terminal's AI agent, with any model you want
2025
13
GPT‑5.3‑Codex‑Spark▲277
An ultra-fast model for real-time coding in Codex
Feb 2026 · openai.com
14
Codex Subagents▲306
Parallel custom agents for complex tasks
Mar 2026 · learn.chatgpt.com
15
Vellum▲416
Build AI agents using plain English to do your boring tasks
Jan 2026 · vellum.ai
16
AI Text Classifier by OpenAI▲309
New AI classifier for indicating AI-written text
2023
17
Content Codex▲314
Your brand’s content strategy, enhanced by AI
2024
18
PR-Agent by CodiumAI▲389
AI-powered chat & code review
2024
19
Presenting CODEX-AI▲7
An AI code completion assistant powered by Gemini.
2025
20
Everything OpenAI Codex▲7
An open-source workflow OS for OpenAI Codex.
May 2026 · github.com
21
Codexy▲13
Lightweight coding agent that runs in your terminal
2025
22
OpenAI Open Models▲480
gpt-oss-120b and gpt-oss-20b open-weight language models
2025
23
Agentation▲436
The visual feedback tool for AI agents
Mar 2026 · agentation.com
24
Instruct▲554
Automate anything with a single prompt
Oct 2025

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