Small-but-happy win:
If you tell ChatGPT not to use em-dashes in your custom instructions, it finally does what it's supposed to do!
— Sam Altman (@sama) November 14, 2025
The em-dash (double-sized dash: —) was a notorious haunt and irritation for power users of ChatGPT, and even explicit instructions to not use it would often result in a reply using em-dashes.
It was also a good hint that the text might be produced by the AI chatbot.
So, while not an earth-shattering development, this little, cosmetic change will surely be welcomed by many.
Read more: Ars Technica and TechCrunch both wax poetic, sarcastically about the «new feature.» See also discussion on r/ChatGPT and r/Singularity.