The builder’s guide to GPT‑5.6

TL;DR - OpenAI’s guide describes how startups can build AI agents faster and more cost-effectively with GPT-5.6, smarter model selection, and new Responses API capabilities.

• Focuses on agent-building workflows for startups.
• Emphasizes selecting models based on capability and cost.
• Highlights Responses API features intended to streamline development.
• Specific technical details or measured results are not provided in the excerpt.