OpenAI has launched GPT‑5.1, the latest version of ChatGPT, designed to make AI conversations feel more natural, human-like, and context-aware.
The update introduces two modes: Instant, optimized for faster and friendlier responses, and Thinking, which handles complex questions with detailed, clear answers.
Users can now customize the AI’s tone and style using six personality presets under the heads – Friendly, Professional, Candid, Quirky, Efficient, and Nerdy, and adjust warmth, formality, and even emoji use.
GPT‑5.1 also improves instruction-following, reduces technical jargon, and applies adaptive reasoning to balance speed and depth depending on the query.
OpenAI CEO Sam Altman called it “a nice upgrade,” highlighting enhanced intelligence, conversational style, and usability.
With these changes, GPT‑5.1 aims to make interactions feel more like speaking with a thoughtful human while giving users greater control over responses, whether for professional tasks, education, or casual conversation.
The rollout begins today for paid users, with free users gaining access shortly afterward.
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