OpenAI publishes GPT-6 model selection guide for startups

On October 3, 2026, OpenAI published a guide to the GPT-6 family aimed at startups, explaining how to pick among the GPT-6 models and how to tune reasoning effort.

According to OpenAI, the guide covers several areas: helping startups choose GPT-6 models, adjusting reasoning effort, improving prompts and skills, coordinating tools, and preparing workflows before they go to production. These items are listed side by side in the source material; OpenAI did not provide specific methods, parameter values, or examples for any of them.

As positioned, the guide spans model-level choices and reasoning settings, prompt and skill optimization, coordination between tools, and the groundwork needed before a workflow reaches production. At the time of the report, no other company or organization had responded to the release, and there were no reports of further developments.