They look similar, but they "think" differently. Here is how to optimize your prompts for the two biggest AI giants.
The Conversationalist. ChatGPT thrives on natural language and Markdown. It treats formatting as a suggestion rather than a strict rule.
The Structuralist. Claude is trained to respect XML tags. It treats them as hard boundaries for data and instructions.
With Prompt Builder, you can use the same "Core Logic" block for both models.
Creative Writing: It tends to be more imaginative and less rigid.
Broad Knowledge: General trivia and world knowledge queries.
Formatting Nuance: When you need a specific tone of voice.
Complex Coding: Following massive architectural patterns.
Data Extraction: Pulling CSVs out of PDFs or large documents.
Rule Following: Sticking to negative constraints ("Do not do X").