AI · alternatives · 2026
24 alternatives to Everything OpenAI Codex
An open-source workflow OS for OpenAI Codex.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier.
- 1
Codex by OpenAI▲954OpenAI's smartest and most intuitive to use model yet
2021 · openai.com · its alternatives →
- 2
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Codex now runs natively on Windows with secure sandbox
Mar 2026 · learn.chatgpt.com · its alternatives →
- 4
The power of Codex with local, self-hosted models and voice
Jul 2026 · opencodesuper.app · its alternatives →
- 5
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 · its alternatives →
- 6
Codex Subagents▲300Parallel custom agents for complex tasks
Mar 2026 · learn.chatgpt.com · its alternatives →
- 7
Skillkit▲252It's an open-source project that lets you create, translate, and work with multiple agents at the same time, and more.
Feb 2026 · agenstskills.com · its alternatives →
- 8
CodeX-Editor▲125A web code editor with AI & multi-language support
2025 · x-codex.vercel.app · its alternatives →
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gpt-oss-120b and gpt-oss-20b open-weight language models
2025 · openai.com · its alternatives →
- 11
Agenta▲362Open-source prompt management & evals for AI teams
Nov 2025 · agenta.ai · its alternatives →
- 12
Codex Plugins▲202Package Codex skills and app integrations as plugins
Mar 2026 · learn.chatgpt.com · its alternatives →
- 13
opencode▲393Your terminal's AI agent, with any model you want
2025 · opencode.ai · its alternatives →
- 14
Open-source Computer Use MCP for AI agents
May 2026 · github.com · its alternatives →
- 15
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AgentMicro▲160Live Codex task status in your macOS menu bar
Aug 2026 · agentmicro.cc · its alternatives →
- 17OS
Complete AI Platform: RAG Systems & Intelligent Agents for Local AI
2025 · rlama.dev · its alternatives →
- 18
Open Agents▲161OpenAgents - The collaboration OS for AI agents. Contribute to openagents-org/openagents development by creating an account on GitHub.
Apr 2026 · open-agents.dev · its alternatives →
- 19
ShioriCode▲119Open-source alternative to Codex & Claude Code
May 2026 · shiori.ai · its alternatives →
- 20
Agent Skills▲190Curated agent-skills: 1,000+ practical skills selected from 63,000+ GitHub skills. Filter by newest/hot/installs. Works with Claude Code, Codex, ChatGPT, and Cursor.
Mar 2026 · agentskill.sh · its alternatives →
- 21
GitHub Agent HQ▲192Run Claude, Codex & Copilot directly in GitHub & VS Code
Feb 2026 · github.blog · its alternatives →
- 22
AgentNotch▲120Real-time AI coding assistant telemetry in your Mac's notch
Jan 2026 · github.com · its alternatives →
- 23
Cognitorafree▲86Built a multi-agent research system with OpenAI Agents SDK where specialized AI agents collaborate autonomously: Master Orchestrator → Data Analyst → Statistician → Report Writer Each agent has specific expertise. The orchestrator delegates tasks. All agents can execute code securely to solve problems. Example workflow: "Analyze e-commerce data" - Data Analyst: writes Python to load/clean data, spots trends - Statistician: performs significance tests, calculates growth rates - Report Writer: synthesizes findings into executive summary This demonstrates OpenAI Agents SDK's handoff system…
2025 · cognitora.dev · its alternatives →
- 24
Advanced Visual Reasoning & Agentic Tool Use
2025 · openai.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →