February 26, 2026To use “I am your AI,” you need an API Key from an AI provider. This document explains what an API and API Key are, why it’s beneficial to use an API Key directly, and how to get one from each AI provider.
API (Application Programming Interface) is, simply put, a gateway for programs to communicate with each other.
January 4, 2026In this chapter, we briefly introduce the APIs provided by OpenAI, along with short explanations and example code for each. Even if you’re not a developer, if you understand the basic idea of what an API is, this chapter may help you get a rough sense of “what you can do” and set direction when you want to build a service using OpenAI’s APIs.
AI providers such as OpenAI offer consumer-facing services like ChatGPT, but they also provide APIs to third-party developers, expanding the ecosystem. For startups, using an API instead of training your own model can be a very practical way to ship high-quality AI features quickly.
August 20, 20262026-08-20
When I first started using AI, model quality was what mattered most. I compared which model wrote better code, read long documents more accurately, and reasoned more deeply. But once AI became part of my actual work and my usage grew, my attention shifted. Using AI well now matters as much as being able to keep using it sustainably.