OpenAI's GPT-5.6 Prompts Developers to 'Stop Over-Explaining'

OpenAI has published new prompting guidance tied to its GPT-5.6 model family launch. The core directive to developers is counterintuitive: stop over-explaining to the model.

The guidance recommends an approach OpenAI calls "outcome-first prompting." Developers define the desired end state, set constraints and stopping conditions, and allow the model to determine the path. This replaces older, heavily prescriptive step-by-step instructions.

The GPT-5.6 family includes three named variants: the flagship Sol, along with Terra and Luna. These models are designed for complex, multi-step agentic workflows central to enterprise AI.

Internal evaluations show the leaner prompting method delivers significant improvements. Performance scores jumped 10 to 15%. Token usage plummeted 41 to 66%, resulting in cost savings between 33 and 67%.