Interpreting the 6 Changes in the GPT 5.5 Prompt Guide: Why Old Prompts Need to Be Rewritten
After OpenAI released the official GPT 5.5 prompt guide, the most notable change wasn't a specific new prompt template, but a fundamental shift in the overall approach to prompt design. In the past, many developers were accustomed to writing lengthy system prompts. These prompts typically listed detailed workflows, fixed steps, mandatory tones, prohibitions, tool invocation…
