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Herdr is a Rust terminal multiplexer that runs your coding agents inside a background server. It marks every pane as working, blocked or idle, and that status rolls up to the workspace, so you can see at a glance which agent is waiting on you.
All three are terminal agents, but they bet on different things. On the official Terminal-Bench 4.0 board, published on 28 August 2026, Claude Code with Opus 5 solves 51.8% of trials at $18.09 each, and Codex with GPT-5.6 Sol solves 37.3% at $7.70. Muse Code appears on no board at all.
Aider is an open-source CLI that connects your Git repository to an LLM to refactor code, add features and fix bugs without leaving the terminal. Works with GPT-4o, Claude and local models via Ollama. Every change generates an automatic commit with a descriptive message, integrating natively into the Git workflow.
