How to choose a GPT-6 model for your AI agent, per OpenAI

OpenAI has published a practical guide to the GPT-6 family, written with startups in mind. It walks through how to choose the right model from the family, how to tune reasoning effort, and how to improve prompts and skills.

The guide also covers coordinating tools and preparing workflows for production. The underlying idea is that results depend not only on the model itself but on everything built around it: instructions, skills, tools and the way a process is launched. That shifts the conversation from "which model is strongest" to "how do we assemble a process that actually works".

Pick one repeatable process, such as invoice approval or a weekly management summary, and map it step by step: which data it needs, which systems it touches, and where a human still makes the call. Pluggable skills and access to 1C, CRM and bank data follow the same principle: 1Cifer gives an agent the right skill and data instead of making you build everything from scratch.