New Delhi, Nov. 18 -- OpenAI says ChatGPT will now follow user instructions to avoid overusing the em dash more reliably. The change gives users better control over punctuation in outputs and addresses a stylistic pattern that has become associated with AI-generated text.

The em dash has recently become a marker people sometimes use to identify AI-written text. Its frequent appearance across essays, emails and social posts has prompted mistaken claims and criticism. Some observers have speculated about causes, training data quirks or platform text conversions, but there's no definitive explanation in the material shared here.

OpenAI says it has improved ChatGPT's responsiveness to user-style instructions so the model will more reliably ...