Summary & Key Takeaways ​

• OpenAI has published a guide for developers building with GPT-5.6.
• The guide focuses on creating faster and more cost-efficient AI agents.
• It covers strategies for smarter model selection within GPT-5.6.
• New capabilities of the Responses API are also highlighted.
• Startups are shown how to maximize the value of the new model.

Our Commentary ​

A new GPT version is always a big deal. The focus on "faster, more cost-efficient AI agents" and "smarter model selection" is exactly what developers need right now. It feels like OpenAI is really listening to the pain points of building with LLMs. I'm curious about the specifics of the new Responses API.