What Is Codex? OpenAI's Coding Agent in the CLI, App and Cloud
What is Codex? OpenAI's coding agent runs in your terminal, the ChatGPT desktop app, your IDE and the cloud. Which plans include it, checked 2 Oct 2026.
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#Engines
11 posts tagged Engines.
What is Pi agent? The open source coding agent harness, explained
Pi agent is Earendil's MIT licensed coding agent harness. What it is, how to install it, what Pi 1.0 and Pi Durable add, and how it compares.
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What Is OpenCode? Install, Pricing and How It Compares
OpenCode is Anomaly's MIT licensed coding agent for the terminal. What it is, how to install it, what it costs, and how it compares with Claude Code and Codex.
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How to Install Gemini CLI, and Can It Use Gemini 4 Yet?
Install Gemini CLI 0.62.0 with one npm command, see which sign ins still work after 18 Jun 2026, and why Gemini 4 Argon isn't in it yet.
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Claude Code vs Antigravity: Which One Fits Your Work?
Claude Code vs Google Antigravity, checked 14 Sep 2026: terminal agent or desktop agent app, Claude inside Antigravity, plans, limits and a verdict.
Comparisons
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Codex CLI: What It Is and How to Install It on Mac, Windows and Linux
Codex CLI is OpenAI's open source coding agent for the terminal. Install it on Mac, Windows or Linux, sign in, update it, check the version or remove it.
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Is Claude Code Open Source?
No. Claude Code is proprietary under Anthropic's terms. What its GitHub repo holds, what the 2026 leak changed, and which open tools sit around it.
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Codex vs Claude Code: Plans, Limits and Computer Use (Sep 2026)
Codex vs Claude Code, checked 29 Sep 2026: models, plans, usage limits, sandboxing, computer use, MCP and subagents in one dated table, then which to pick.
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Claude Code vs GitHub Copilot: CLI, Editor and Pricing Compared
Claude Code vs GitHub Copilot, checked 29 Sep 2026: Copilot CLI and the editor, AI Credits vs Claude plans, models, hooks, and when to pick each.
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How to Add a GitHub Copilot CLI Agent to Your Floor
A step-by-step v0.3.3 walkthrough: install GitHub Copilot CLI (or let the harness install it for you), hire a Copilot worker, pick a model, and know exactly what print mode can and can't do.
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Run a Mixed-Engine Office: the Right CLI for Every Desk
A practical guide to mixing agent engines on one Munder Difflin floor: Claude Code as orchestrator, Codex for coding bursts, Copilot for dispatched tasks, and OpenCode/Crush/pi.dev for BYOK keys and local models.
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