Core Insights - The article discusses the recent upgrade of ChatGPT to version GPT-5.1, emphasizing its enhanced intelligence and conversational abilities [3][4]. Group 1: Model Features - GPT-5.1 includes two sub-models: GPT-5.1 Instant for quick responses and GPT-5.1 Thinking for complex reasoning [5][7]. - The upgrade aims to make simple questions faster and complex questions smarter, with OpenAI's CEO praising improvements in instruction adherence and adaptive thinking [6][20]. - GPT-5.1 Instant is designed for everyday conversations, providing a more friendly and engaging interaction style compared to the previous version [10][11]. Group 2: User Experience - The new model allows users to customize the tone and style of interactions, offering eight predefined personality traits, including professional and friendly [26][27]. - Users can also adjust various characteristics of ChatGPT's responses, such as conciseness and warmth, enhancing personalization [27][28]. - Early user tests indicate that the more personalized GPT-5.1 provides a unique and engaging experience, showcasing its ability to respond humorously and empathetically [29][31]. Group 3: Performance Comparison - GPT-5.1 Instant demonstrates a significant improvement in response time, being able to answer typical tasks twice as fast as its predecessor [20]. - In complex tasks, GPT-5.1 Thinking not only provides clear explanations but also adds contextual information, enhancing user understanding [23][24]. Group 4: Future Developments - OpenAI plans to introduce both GPT-5.1 Instant and GPT-5.1 Thinking to its API later this week, expanding access to these advanced features [25].

Core Insights - The article discusses the sudden update of ChatGPT to version GPT-5.1, emphasizing its enhanced intelligence and conversational abilities [2][5]. - The new model is designed to provide faster responses for simple queries and smarter solutions for complex problems [5][24]. Model Features - GPT-5.1 Instant focuses on everyday conversations and quick responses, while GPT-5.1 Thinking is tailored for complex reasoning and in-depth inquiries [5][23]. - The upgrade includes improved adherence to user instructions, showcasing a significant difference in response style and tone compared to the previous version [20][21]. User Experience - Early tests indicate that GPT-5.1 Instant offers a more friendly and engaging interaction, often surprising users with its light-hearted responses [11][13]. - The model's ability to follow specific instructions has been notably enhanced, with GPT-5.1 Instant successfully adhering to constraints like responding in a limited number of words [21]. Technical Advancements - The introduction of adaptive reasoning technology allows GPT-5.1 Instant to determine when to think critically before responding, balancing speed and accuracy [21][22]. - GPT-5.1 Thinking is reported to be twice as fast as its predecessor in typical tasks, while also providing clearer explanations with less jargon [25][28]. Personalization Features - OpenAI has made it easier for users to customize the tone and style of ChatGPT, offering eight predefined personality traits and the ability to adjust various response characteristics [32][33]. - The model can also proactively ask users about their preferred tone during conversations, enhancing the personalization experience [34]. User Feedback - Initial user experiences highlight the model's personality, with humorous and relatable responses to absurd queries, showcasing its ability to engage in a more human-like manner [36][38][42].

Core Insights - The article discusses the recent upgrade of ChatGPT to version GPT-5.1, which emphasizes improved intelligence and conversational abilities [1][2]. Model Features - GPT-5.1 includes two sub-models: GPT-5.1 Instant for everyday conversations and quick responses, and GPT-5.1 Thinking for complex reasoning and in-depth problem-solving [2][19]. - The new model allows users to customize the tone and style of interactions, making it more personable and engaging [4][27]. Performance Improvements - Early tests indicate that GPT-5.1 Instant provides more enjoyable and light-hearted responses while maintaining practicality [5][30]. - The model's adherence to instructions has improved significantly, showcasing a better ability to follow specific guidelines [12][15]. Adaptive Reasoning - GPT-5.1 Instant employs adaptive reasoning technology, allowing it to decide when to think critically before responding, thus enhancing the quality of answers [17][18]. - GPT-5.1 Thinking is designed to be twice as fast as its predecessor in typical tasks, while also providing clearer explanations for specialized topics [20][24]. User Customization - Users can select from eight predefined personality traits for the AI, including professional, friendly, and sarcastic, among others [27]. - OpenAI is testing a feature that allows the model to proactively ask users about their preferred tone or style during conversations [28]. User Experience - Initial user experiences suggest that the more personalized GPT-5.1 offers a unique and entertaining interaction, with examples of humorous exchanges [30][32].