AI Coding Agents Compared (October 2026): Codex, Claude Code, Cursor, Factory, Muse Code

Every new model launch in September and October 2026 came with a coding agent attached. The agent decides how the model touches your code, so choose the agent first and the model second.

The main agents

• Codex (OpenAI): included with ChatGPT Plus, Pro, Business, Enterprise and Edu; runs GPT-6.1 Sol and GPT-6 Astra, with an Ultrafast Sol on the way.
• Claude Code (Anthropic): included with Claude Pro, Max, Team and Enterprise; runs Opus, Sonnet and Haiku 5.5, with a fast mode for Opus.
• Cursor: an editor with agents across OpenAI, Claude and Gemini models; Pro+ and Ultra add more usage and include Grok Bot.
• Factory Droids: autonomous agents that take a ticket to a pull request, from the terminal, IDE or Slack.
• Warp: a terminal with built-in agents and model choice.
• Muse Code (Meta): Meta's coding agent, the only place to use Muse Wonder Full.
• Grok Bot (xAI): not a coding tool first, but can drive a Cursor cloud agent as part of a workflow.

Get them through PerkShelf

• Cursor Pro, one year ($119.99) or Pro+ ($399.99); compared in our Cursor coupon guide
• Factory AI Pro, one year ($89.99); setup in the Droid guide
• Warp Build, one year ($21.99)
• Claude Code or Codex CLI on pay-as-you-go: Claude API credit and Codex packs

How to choose

Live in an editor: Cursor. Live in a terminal: Claude Code, Codex CLI or Warp. Want tickets closed while you do other work: Factory. Already pay for ChatGPT or Claude: start with the agent your plan includes.

Frequently asked questions

Which coding agent is best?

The one that fits where you work. The model behind it matters less than whether it can run your tests and see your whole repo.

Can I use Claude models in Cursor?

Yes. Cursor's paid plans include OpenAI, Claude and Gemini models.