A model guide for the GPT-6 family

Why it matters

【What it is】

On October 2, 2026, OpenAI posted “A model guide for the GPT-6 family.” It tells engineering teams how to pick a model, set reasoning effort and speed, keep prompts, skills, and repository instructions consistent, and move a workflow into production.

The page is in three parts: running in production, adjusting prompts and skills, and keeping long-running work on track. Production covers caching, compaction, measuring success and latency, and monitoring. Long-running work covers steering, async tools, and delegation, including when the model should ask for input. A closing section looks at teams taking GPT-6 Astra from testing to production.

【Verifiable】

Primary: https://openai.com/index/practical-guide-building-gpt-6/

Title: A model guide for the GPT-6 family. Section: Product. Visible date: October 2, 2026. The lede is about choosing a GPT-6 model, giving effective instructions, managing long-running work, and preparing for production.

【Our read】

An engineering guide for the existing GPT-6 family, not a new frontier model, and no new performance numbers others can reproduce.