Summary & Key Takeaways ​

• This guide offers comprehensive strategies for effectively prompting the hypothetical GPT-5.5 model.
• It delves into advanced techniques such as few-shot learning, chain-of-thought reasoning, and effective tool utilization.
• The article provides best practices and specific examples for various tasks, aiming to help users maximize the model's performance.
• It serves as a valuable resource for AI practitioners and researchers working with large language models.

Our Commentary ​

Simon Willison's guides are always gold, and a prompting guide for a model as advanced as GPT-5.5 (even if hypothetical for now) is incredibly valuable. As LLMs become more powerful, the art and science of prompting become even more critical. We appreciate the focus on practical, actionable advice that goes beyond basic instructions, helping developers truly unlock the potential of these models. This is the kind of resource that shapes how we interact with AI.