# Cmux: Run Multiple AI Coding Agents in Parallel on macOS

> Cmux is a native macOS terminal for running multiple AI agents in parallel with vertical tabs, split panes, and automatic finish notifications.

Published: 2026-03-22
URL: https://daniliants.com/insights/supercharge-claude-code-with-cmux/
Tags: claude-code, cmux, terminal-multiplexer, parallel-agents, macos, developer-tools, ai-coding

---

## Summary

Cmux is a native macOS terminal app purpose-built for running multiple AI coding agents (Claude Code, Codex, Gemini CLI, etc.) in parallel with vertical tabs, split panes, and automatic notifications. It launched February 2026 and hit 7 700 GitHub stars in its first month, reflecting strong demand for multi-agent orchestration tooling.

## Key Insight

- **Cmux** is a Ghostty-based native macOS terminal with vertical tabs, split panes, an embedded browser, and a socket API - designed specifically for AI coding workflows
- Notifications fire automatically via standard terminal escape sequences (OSC 9/99/777) or via the cmux CLI and Claude Code hooks - so you can kick off multiple agents and get alerted when each finishes
- The multi-agent multiplexer space is heating up fast: alternatives include **amux** (tmux-based, browser/phone control, runs dozens of unattended agents), **cmuxlayer** (MCP server with spawn_agent/stop_agent tools), and **NTM** (named tmux manager with conflict detection and TUI dashboard)
- Key workflow: spin up isolated Claude Code sessions per task (bug fix, feature, refactor), let them run in parallel, review results when notified - effectively multiplying your throughput without context-switching overhead
- Works with any CLI tool, not just Claude Code - also supports Codex, OpenCode, Gemini CLI, Kiro, and Aider