OpenAI Fixes ChatGPT's Infamous Em Dash Problem OpenAI has announced a major update that addresses one of ChatGPT's most persistent and annoying quirks: its <b>excessive, unprompted use of the em dash (—)</b>. This seemingly small fix is a significant victory for writers, editors, and businesses seeking greater control over the style and authenticity of their AI-generated content. OpenAI CEO Sam Altman <a href="https://x.com/sama/status/1989193813043069219">confirmed</a> the fix, calling it a <b>"small-but-happy win,"</b> and noted that users can now effectively tell the chatbot to ditch the long punctuation mark via custom instructions. This change marks a crucial step toward creating AI content that is less formulaic and more aligned with human-level stylistic control. The Em Dash Epidemic: Why Was It a Problem? For over a year, the <a href="https://www.rollingstone.com/culture/culture-features/chatgpt-hypen-em-dash-ai-writing-1235314945/">em dash</a> became a notorious <b>"tell-tale sign"</b> of AI-written text. The punctuation mark, often used by the chatbot for parenthetical clauses or dramatic pauses, appeared so frequently that content peppered with them was immediately suspected of being generated by ChatGPT. The Problem ChatGPT often ignored explicit user requests to stop using the em dash, continuing to insert them liberally even when instructed otherwise. The Impact Why Did AI Models Love the Em Dash? While OpenAI hasn't officially explained the phenomenon, theories suggest the model's training data played a role. Em dashes are frequent in professional writing, news articles, and perhaps most significantly, older texts like <b>19th-century books</b> (which are abundant in the public domain and often used for LLM training). The AI may have simply learned that the em dash was a high-probability punctuation choice in its vast dataset. How OpenAI Finally Tamed the Punctuation Rebel The solution is straightforward and leverages one of ChatGPT's most useful features: <a href="https://openai.com/index/custom-instructions-for-chatgpt/">Custom Instructions</a>. The new update ensures that the model now respects specific user instructions regarding punctuation style. If you want the em dashes gone, the fix allows you to mandate it. <b>The Step-by-Step Fix:</b> This setting should now be stored in the model's memory for all future conversations, ensuring your AI-generated text adheres to your desired style guide.
