A strengths-and-weaknesses comparison of the open coding agents Codex, Pi, OpenCode, Kimi Code and Gemini CLI, plus why Claude Code arguably has the best harness despite being closed.

After reading the source of five open coding agents — OpenAI's Codex, Pi, OpenCode, Kimi Code and Gemini CLI — here is how they actually stack up, strengths and weaknesses, which one wins, and why the best harness of all belongs to a tool we deliberately left out of the code study: Claude Code.

The Coding Agent Shootout and the Best Harness We Could Not Read

A code-level comparison of OpenAI Codex, Pi (pi.dev) and Nous Research's Hermes Agent, using their differences to explain the different types of AI agents.

Comparing OpenAI Codex, Pi (pi.dev) and Hermes Agent by Nous Research — an odd trio at first glance, but their differences map out the whole landscape of AI agents: what each type is, what it can do, and which one can help you.

Tag: Codex

Tag: Codex

The Coding Agent Shootout and the Best Harness We Could Not Read

Codex, Pi and Hermes: Three Agents, Three Species