Did GPT-5 Codex just kill Claude Code?

Alex Finn · Sep 21, 2026 · 22m

In this video I go over OpenAI's new model GPT-5 Codex and compare it to Claude Code

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Install Codex:

npm i -g @openai/codex

Codex announcement:

https://openai.com/index/introducing-upgrades-to-codex/

AGENT Rules:

1. First think through the problem, read the codebase for relevant files, and write a plan to tasks/todo.md.

2. The plan should have a list of todo items that you can…