GPT-5.5 prompting guide

📰 Simon Willison's Blog

Learn how to effectively prompt GPT-5.5 for better results, especially in applications with delayed user-visible responses

intermediate Published 25 Apr 2026
Action Steps
  1. Read OpenAI's official guidelines for prompting GPT-5.5
  2. Apply the recommended prompting techniques for delayed user-visible responses
  3. Test and refine your prompts for optimal results
  4. Use the GPT-5.5 API to implement the new prompting strategies
  5. Evaluate the impact of improved prompting on your application's user experience
Who Needs to Know This

Developers and data scientists working with GPT-5.5 can benefit from this guide to improve their model's performance and response times

Key Insight

💡 Effective prompting is crucial for getting the most out of GPT-5.5, especially in applications with delayed user-visible responses

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🤖 Improve your GPT-5.5 prompts with OpenAI's latest guidelines! 🚀

Key Takeaways

Learn how to effectively prompt GPT-5.5 for better results, especially in applications with delayed user-visible responses

Full Article

GPT-5.5 prompting guide Now that GPT-5.5 is available in the API , OpenAI have released a wealth of useful tips on how best to prompt the new model. Here's a neat trick they recommend for applications that might spend considerable time thinking before returning a user-visible response: Before any
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