OpenAI Codex alternatives in 2026: 24 tools like OpenAI Codex

Closest: Commercial Agents

Amp

Sourcegraph's coding agent for CLI and VS Code with multi-repo codebase context

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1 use thisCompare with OpenAI Codex
Codebuff

Works in your terminal to help you write and deeply understand your code

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1 use thisCompare with OpenAI Codex
Factory

Agent-native software development platform built around Droids

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1 use thisCompare with OpenAI Codex
Amazon Q Developer

AWS coding assistant; AWS points IDE plugin users to Kiro

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0 use thisCompare with OpenAI Codex
Aristotle

AI agent that proves maths and code correct with Lean proofs

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0 use thisCompare with OpenAI Codex
Blackbox AI

Autonomous AI Coding Agent with integrated IDE

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0 use thisCompare with OpenAI Codex
CTO.new

Free AI coding agent

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0 use thisCompare with OpenAI Codex
Devin

Fully autonomous AI software engineer by Cognition

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0 use thisCompare with OpenAI Codex
Gemini Code Assist

Gemini-powered coding assistant integrating into VS Code, JetBrains, and the CLI

Curated

0 use thisCompare with OpenAI Codex
JetBrains Junie

JetBrains' smart coding agent deeply integrated into IntelliJ-based IDEs

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0 use thisCompare with OpenAI Codex
Jules

Google's async AI coding agent that works independently on GitHub issues and PRs

Curated

0 use thisCompare with OpenAI Codex
Kimi Code

Moonshot's coding agent with CLI, desktop and IDE plugin surfaces

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0 use thisCompare with OpenAI Codex
Meta Muse Code

Meta's terminal coding agent for large-repo engineering tasks

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0 use thisCompare with OpenAI Codex
Slate

Purpose-built agent for long and complex coding tasks

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0 use thisCompare with OpenAI Codex

More in Coding Agents

Claude Code

Anthropic's agentic coding tool for terminal use

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2 use thisCompare with OpenAI Codex
Cursor

AI-native code editor

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2 use thisCompare with OpenAI Codex
Google Antigravity

Google's agentic development platform evolving the IDE into the agent-first era

CuratedLinuxMacWindows

2 use thisCompare with OpenAI Codex
Zed

High-performance Rust code editor with native AI chat and multi-model support

CuratedLinuxMacWindows

2 use thisCompare with OpenAI Codex
Mistral Vibe CLI

Command-line coding assistant powered by Mistral's open-weight models

Curated

1 use thisCompare with OpenAI Codex
OpenCode

Open-source coding agent for terminal, IDE, and desktop

CuratedLinuxMacWindows

1 use thisCompare with OpenAI Codex
Prime Agent

Self-improving open-source agent harness from Prime Intellect

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1 use thisCompare with OpenAI Codex
Warp

AI-native terminal with inline AI, agentic workflows, and team collaboration

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1 use thisCompare with OpenAI Codex
GitHub Copilot

GitHub's coding assistant and agent across IDE, CLI and github.com

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1 use thisCompare with OpenAI Codex
Aider

AI pair programming in your terminal

Curated

0 use thisCompare with OpenAI Codex

Questions

What are the closest alternatives to OpenAI Codex?

Amp, Codebuff and Factory sit on the same sub-line as OpenAI Codex (Commercial Agents) on AI Landscape, with 11 more.

How are these alternatives chosen?

They are the other products on the Coding Agents stop of the map: curated products first, the ones on OpenAI Codex's sub-line before the rest, then by name until members have marked enough of them.