GPT-5.1 gets warmer: tone is part of the product
After users said GPT-5 felt cold, OpenAI made its models friendlier and added personality settings. For businesses, it's a reminder that how your AI sounds is how your brand sounds.
By the Xuru Technologies team · 14 November 2025
Key takeaways
- On 12 November 2025 OpenAI released GPT-5.1 Instant and GPT-5.1 Thinking.
- OpenAI said the models were warmer, more conversational and better at following instructions.
- ChatGPT added more tone and personality presets.
- Businesses should define their AI's tone deliberately — friendly, clear and on-brand.
Customers judge a business by every interaction. If your website assistant sounds robotic or overly casual, it shapes how they feel about you.
What happened
OpenAI announced GPT-5.1, and AlternativeTo summarised the faster, warmer variants and personalisation options.
What it means for customer-facing AI
- Tone is configurable. Write a short brand voice guide for your assistant.
- Warm doesn't mean vague. Clear answers matter more than friendliness.
- Consistency across channels — website chat, email drafts and social replies.
- Human handover when emotions run high or issues are complex.
AI voice guide template
| Element | Example |
|---|---|
| Personality | Warm, knowledgeable, concise |
| Do | Use plain language, offer next steps |
| Don't | Over-promise, use slang, guess prices |
| Escalate when | Complaints, payments, sensitive topics |
Frequently asked questions
Can we control how our chatbot sounds?
Yes. Instructions, examples and testing shape tone. Review conversations regularly.
Should our AI pretend to be human?
No. Label it as an AI assistant — it builds trust and meets transparency expectations.
Which model is best for customer chat?
Test a few on your real questions for accuracy, tone and cost.
An assistant that sounds like your business.
We build AI assistants with your tone, your facts and smooth handover to your team.
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