ChatGPT now lets you dial up the warmth or tone down the enthusiasm in its responses

You can also adjust how often it uses emoji, headers, and tables.

By Pranob Mehrotra Published December 22, 2025

ChatGPT on a smartphone — Unsplash

OpenAI introduced a host of new personality presets with ChatGPT 5.1 last month, giving users the option to customize the main voice and tone of the chatbot’s replies. Now, the company is rolling out additional customization options that let users further fine-tune ChatGPT’s personality.

In a recent post on X, OpenAI revealed that users can now tweak specific traits, like warmth and enthusiasm, to customize how ChatGPT comes across in conversation. The company has added four new characteristics customizations, labeled Warmth, Enthusiasm, Headers & Lists, and Emoji, to ChatGPT’s Personalization settings.

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Each of these options can be set to More, Less, or Default, letting users control how warm or enthusiastic ChatGPT sounds, while also adjusting how often it uses emojis, headers, and lists in responses. These options let users shape ChatGPT into a more personalized conversational partner that better fits their style, mood, or workflow.

You can now adjust specific characteristics in ChatGPT, like warmth, enthusiasm, and emoji use.

Now available in your “Personalization” settings. pic.twitter.com/7WSkOQVTKU
— OpenAI (@OpenAI) December 19, 2025

These new customization options build on the base presets introduced in version 5.1, like Professional, Candid, and Quirky. While those presets set a general tone, the new options let users dial in subtle nuances, creating a more customized conversational experience.

Tune ChatGPT to fit your style

ChatGPT’s personalization settings come in direct response to user feedback, and address complaints about the chatbot’s responses feeling too formal, overly cautious, or flat. By giving users more granular control, OpenAI is letting them shape ChatGPT to feel more natural, engaging, and aligned with their personal preferences.

OpenAI CEO Sam Altman first promised this feature back in October, following backlash after the release of GPT-5, which introduced a more restrictive and less dynamic version of ChatGPT compared to GPT-4o. At the time, Altman also teased a new adult mode that would “allow even more, like erotica for verified adults.” While the new personality settings are now live, the company recently confirmed that the adult mode has been pushed to 2026.

Pranob Mehrotra

News Writer

Pranob is a seasoned tech journalist with over eight years of experience covering consumer technology. His work has been…

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