GPT-4.1 not respecting single line break between bold title and paragraph

Prompting
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Looks like the model is too overfitted on post training to obey any system instructions. Just be thankful it is not like o3, producing dumb tables and em-spaces as code indentation and filling code with multi-byte code points.

The image shows a system message from a chatbot interface detailing markdown output settings and instructions for documentation AI, including markdown rules and example features. (Captioned by AI)
The image shows a system message from a chatbot interface detailing markdown output settings and instructions for documentation AI, including markdown rules and example features. (Captioned by AI)539×507 24.8 KB

The image shows a step-by-step usage guide for the 'get_ft_jobs' Python method, explaining prerequisites like Python 3.9+, the httpx library, and setting the OpenAI API key as an environment variable. (Captioned by AI)
The image shows a step-by-step usage guide for the 'get_ft_jobs' Python method, explaining prerequisites like Python 3.9+, the httpx library, and setting the OpenAI API key as an environment variable. (Captioned by AI)521×404 22.3 KB

You have a short window to enjoy gpt-4.5 to follow instructions before they flip the off switch on the only AI that is powered by IQ.

A dark-themed digital note or document provides a step-by-step usage guide for the Python method , including instructions for installing the library and setting up an OpenAI API key. (Captioned by AI)
A dark-themed digital note or document provides a step-by-step usage guide for the Python method , including instructions for installing the library and setting up an OpenAI API key. (Captioned by AI)511×387 23.9 KB

You could probably write up a regex for this. Even just replacing \n\n with \n if you want it to hit the entire document.