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Codex Alternatives
Similar projects and alternatives to codex
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ollama
Get up and running with Kimi-K2.6, GLM-5.1, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.
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claude-code
Claude Code is an agentic coding tool that lives in your terminal, understands your codebase, and helps you code faster by executing routine tasks, explaining complex code, and handling git workflows - all through natural language commands.
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zed
Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.
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burr
Build applications that make decisions (chatbots, agents, simulations, etc...). Monitor, trace, persist, and execute on your own infrastructure.
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claude-code
Discontinued The repo is finally unlocked. enjoy the party! The fastest repo in history to surpass 100K stars ⭐. Join Discord: https://discord.gg/5TUQKqFWd Built in Rust using oh-my-codex. [Moved to: https://github.com/ultraworkers/claw-code] (by instructkr)
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better codex alternative or higher similarity.
codex discussion
codex reviews and mentions
Posts with mentions or reviews of codex.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2026-06-12.
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AGENTS.md, CLAUDE.md y memoria de proyecto: como dar contexto a agentes de codigo
OpenAI Codex: AGENTS.md
- /architect: Reduce Fable tokens by 80%, Fable orchestrates/reviews, Codex builds
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Apache Burr: Build reliable AI agents and applications
You can absolutely do that by using subprocess.run, or use the codex sdk
https://github.com/openai/codex/tree/main/sdk/python
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Lockdown Mode
> reduce the risk of data exfiltration
Yet, their tools such as codex are able to read ALL FILES on my PC without explicit permission unless you spawn them within a container: https://github.com/openai/codex/issues/2847
It seems like OpenAI stealing sensitive data from their customers is not a big problem for them as it has been reported as an issue for almost a year now and currently has the 2nd most upvotes among open issues (they work on issues based on upvotes, so they claim).
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MCP Is Dead
It would be really, really great if Codex could support MCP Prompts[0]
This would allow us to deliver standard prompts across the team without having to sync manually or with scripts; keep everyone up to date. Even allow per-user customization of "skills" via server rendering of the prompts.
AFAIK, Codex is the only major harness to not support this.
[0] https://github.com/openai/codex/issues/5059#issuecomment-453...
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Run OpenAI Codex CLI on Claude, Gemini, or Llama — in 50 lines of C#
OpenAI's Codex CLI ships with a great editor-agent UX: shell tool, apply_patch, plan tracking, the lot. The catch — as of February 2026 it only speaks the OpenAI Responses API. Chat Completion support was dropped (codex-rs/model-provider-info/src/lib.rs: the WireApi enum has one variant, Responses). If you wanted to point it at a Chat-Completion-only endpoint — Ollama, LM Studio, your favorite Llama runner — you're out of luck.
- Codex is flagged as malware on macOS
- OpenAI intentionally removed Codex's visible context usage indicator
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codex VS faryo - a user suggested alternative
2 projects | 20 May 2026
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How Far Can a Small Coding Model Go With a Better Harness?
Every edit goes through one tool: apply_patch. I standardized on it instead of a generic edit or write because Codex models are trained directly on the V4A patch format, and because structured diffs are easier to validate, retry, and explain than arbitrary file writes. V4A is OpenAI's diff envelope for Codex-family models — in Hookele, one payload can create, update, and delete files in a single call:
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A note from our sponsor - SaaSHub
www.saashub.com | 15 Jun 2026
Stats
Basic codex repo stats
134
90,669
10.0
3 days ago
openai/codex is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of codex is Rust.
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