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Alternatives to OpenAI Codex
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Claude Code AI coding agent from Anthropic for the terminal, IDE, desktop and web
Uses Anthropic's Claude models, and also runs through Amazon Bedrock, Google Cloud and Microsoft Foundry.

Cursor AI code editor and coding agent for desktop, terminal, web and iPhone
Models from OpenAI, Anthropic, Google and others in one editor.

Gemini CLI Google's open-source AI agent that runs Gemini models in your terminal
Uses Google's Gemini models with Google Search built in, through Gemini Code Assist or Vertex AI.

GitHub Copilot AI coding assistant and agents in the editor, terminal, desktop app and GitHub
Built into github.com: assign an issue to the Copilot cloud agent and it opens a pull request.

Grok Build Open-source coding agent for the terminal, made by SpaceXSI
Uses xAI's Grok models and shares one weekly usage pool with Cursor in the X Subscription.

Hermes Agent Open-source, self-hosted AI agent with memory that lasts between sessions
Runs in a terminal, a desktop app or chat apps; the agent is free and the Nous Portal plan is optional.
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