OpenAI has released GPT‑5.1, the latest version of ChatGPT, designed to make AI conversations feel more natural, human-like, and context-aware.
The update comes with two modes: Instant, for quick and friendly replies, and Thinking, for complex questions that require detailed, thoughtful answers. Users can now customize the AI’s personality and tone, choosing from six presets namely Friendly, Professional, Candid, Quirky, Efficient, and Nerdy, to adjust warmth, formality, and even emoji usage.
GPT‑5.1 also improves instruction-following, reduces technical jargon, and uses adaptive reasoning to provide answers that are clear and relevant. With these changes, GPT‑5.1 aims to make AI interactions feel more like talking to a thoughtful human while giving users greater control over responses.
The rollout begins today for paid users, with free users gaining access shortly afterward. OpenAI CEO Sam Altman called it “a nice upgrade,” emphasizing the improvements in intelligence, style, and usability.
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