Code Tools

OpenAI Codex

by OpenAI · Freemium

OpenAI's agentic coding tool built into ChatGPT. Runs autonomous multi-step coding tasks, edits across files, integrates with GitHub, and supports computer use. Included in all paid ChatGPT plans from $20/mo.

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4.0

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📋 Editorial Review

In-Depth Editorial ★ Editor's Pick

OpenAI Codex Review 2026: The Coding Agent That Just Got a Lot More Powerful

OpenAI Codex is the agentic coding tool built into every paid ChatGPT plan. The April 16, 2026 update added computer use, memory, image generation, and 90+ plugins — turning it from a coding assistant into a full developer workstation. Included from $20/mo on ChatGPT Plus, with a new $100/mo tier for heavier Codex usage.

✎ pat bob 🕑 8 min read 👁 13,040 views

8.8

Score

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⭐ User Reviews

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★★★★☆

4/5 13 Jun 2026

A Capable Agentic Coder for Delegating Whole Tasks, Not Just Autocomplete

“Codex handles delegated, multi-file coding work — give it a task and a repo and it plans, edits across files, and runs in a sandbox rather than just suggesting lines.”

By AITools · Delegated coding tasks, multi-file refactors, endpoint and test generation from clear specs · Paid tier

✓ Pros

Agentic — handles whole tasks across multiple files, not just completions. Runs in a sandboxed environment. Good at well-scoped tickets and test writing. Frees you up while it works.

✗ Cons

Vague or large tasks still need significant cleanup. Requires careful code review before merging. Tied to OpenAI pricing and the surrounding tooling.

⚖ Comparisons

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OpenAI Codex vs GitHub Copilot (2026): Agentic Tasks vs Inline Coding

GitHub Copilot suggests code as you type; OpenAI Codex takes on whole tasks. Which suits how you actually work?

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