Three ways to connect a ChatGPT subscription to dev tools, and their limits

不想为 GPT 付两次钱：把 ChatGPT 订阅接进你的工具

A ChatGPT subscription can reach external dev tools three ways: an official API key, Sign in with ChatGPT, and reusing the Codex client identity. The article compares billing and usage limits for each.

Why it matters: It lays out how the three paths differ on billing, feature limits and protocol guarantees when wiring a ChatGPT subscription into dev tools.