Prompting Guidance for GPT-5.6 Sol

What it is — OpenAI’s official guidance for adapting prompts and agent workflows to GPT-5.6 Sol.

Key points

• Strip redundant instructions, examples, and tools first — OpenAI’s internal tests found leaner prompts scored 10–15% better while cutting tokens 41–66%.
• Describe the destination rather than prescribing every step, with clear stopping conditions and defined approval boundaries for autonomous action.
• Migrate models incrementally: test before and after prompt changes, and debug regressions from real traces rather than rewriting prompts wholesale.