Core Viewpoint - OpenAI has released GPT-5.1, an upgraded version of its flagship model, enhancing the intelligence and conversational quality of ChatGPT while introducing more personality and tone options for users [2][3]. Model Updates - The new models include GPT-5.1 Instant and GPT-5.1 Thinking, with the former being more enthusiastic and intelligent, and the latter improving understanding and task processing speed [3][4]. - GPT-5.1 Instant utilizes adaptive reasoning technology, allowing it to decide when to think before answering challenging questions, resulting in more comprehensive and accurate responses [5][6]. - GPT-5.1 Thinking adjusts its thinking time based on the complexity of the question, providing detailed answers for difficult queries and quicker responses for simpler ones [8]. User Experience Enhancements - OpenAI has improved the instruction execution capability of the models, making them more reliable in answering user queries [5]. - The introduction of customizable tone options allows users to select from various presets, such as Friendly, Candid, and Quirky, enhancing personalization [13][15]. - The models are designed to sound more intelligent and natural, with the system automatically routing queries to the most suitable model [11]. Industry Trends - The push for model personification is seen as a broader trend among tech companies, aiming to create more human-like interactions to enhance user experience and trust [18][16]. - The emphasis on making AI more relatable and warm is viewed as a strategy to improve user engagement and expand application scenarios [18]. User Feedback - The release of GPT-5.1 has sparked mixed reactions, with some users expressing a desire for more efficient tools rather than virtual companions [20][22]. - Criticism has emerged regarding the focus on personality traits, with some users preferring a more straightforward and utilitarian approach to AI interactions [21][22].