Sign in with ChatGPT: The Developer Guide to Plan Usage OpenAI's "Sign in with ChatGPT" feature lets Plus and Pro subscribers fund an app's AI usage with their existing ChatGPT subscription, according to a developer guide published by byteiota. The guide covers the OAuth flow, plan usage restrictions, and error codes developers need to implement the integration. Sign in with ChatGPT lets Plus and Pro users fund your app's AI with their subscription. Here is the OAuth flow, plan usage restrictions, error codes, and what to build now. The post Sign in with ChatGPT: The Developer Guide to Plan Usage appeared first on byteiota .