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GPT-5.1 - OpenAI's latest upgraded AI model

GPT-5.1 is an upgraded version of the GPT-5 series from OpenAI, enhancing intelligence and communication capabilities. GPT-5.1 includes two versions: GPT-5.1 Instant and GPT-5.1 Thinking.

What is GPT-5.1?

GPT-5.1 is OpenAI's upgraded version of the GPT-5 series, enhancing intelligence and communication capabilities. GPT-5.1 includes two versions: GPT-5.1 Instant and GPT-5.1 Thinking. Instant is warmer and more natural, suitable for everyday conversations, better follows instructions, and provides engaging responses; Thinking focuses on complex reasoning, more precisely adjusting thinking time, handling complex tasks more thoroughly, and simple tasks more quickly. GPT-5.1 supports adaptive reasoning, optimizing the accuracy and efficiency of responses. This model upgrade improves performance, enhances user experience, and makes AI dialogue more enjoyable and natural.

Main functions of GPT-5.1

  • A smarter conversational experienceGPT-5.1 Instant is warmer, more natural, and more empathetic, suitable for everyday conversations, and can communicate in a more human way, providing more interesting and practical answers.
  • Efficient Reasoning and Complex Task ProcessingGPT-5.1 Thinking is more persistent and accurate with complex problems, dynamically adjusts thinking time based on problem complexity, provides more detailed answers, and responds faster with simple tasks.
  • Adaptive reasoningThe model introduces an adaptive reasoning mechanism for the first time. When faced with complex problems, the model will automatically decide whether to think more deeply and provide more comprehensive and accurate answers while maintaining a fast response.
  • Enhanced instruction execution capabilityThe model can more reliably follow user instructions, accurately answer questions, and reduce misunderstandings and biases.
  • Clearer outputGPT-5.1 Thinking provides more accessible and understandable answers, reduces the use of technical terms and undefined words, and is suitable for explaining complex concepts and technical issues.
  • CustomizableUsers can adjust the tone and style of the model through ChatGPT's personalization settings, such as friendly, professional, efficient, etc., and can even fine-tune the conciseness and warmth of its answers.

How to use GPT-5.1

GPT-5.1 Instant and Thinking versions will be rolled out gradually starting November 12th.,Initially, it will be available to paid users (Pro, Plus, Go, Business), followed by free users and those not logged in. Enterprise and Education users can enjoy a seven-day early access period (disabled by default). After the trial period, GPT-5.1 will become the sole default model.

  • Using ChatGPT
    • Log in to ChatGPTVisit the ChatGPT website and log in to your account.
    • Select ModelIf you are a paid user (such as Pro, Plus, Go, or Business), you may see the options for GPT-5.1 Instant and GPT-5.1 Thinking in the ChatGPT interface. If you don't see them, please wait a few days; the models are being rolled out gradually.
    • Start conversationEnter your question or command in the dialog box to experience the features of GPT-5.1.
    • Personalization settingsIn ChatGPT settings, adjust the model's tone and style (such as friendly, professional, efficient, etc.), or fine-tune the conciseness and warmth of the responses.
  • Use via API:
    • Obtain API accessRegister an account on the OpenAI API platform. After registration, you will receive an API key.
    • Select ModelIn the API platform, locate the options for GPT-5.1 Instant and GPT-5.1 Thinking. These correspond to... gpt-5.1-chat-latest and gpt-5.1.
    • Using the API platform interfaceYou can get answers by directly entering your question on the webpage.

Project address for GPT-5.1

  • Project official websitehttps://openai.com/index/gpt-5-1/
  • Technical Papers: https://cdn.openai.com/pdf/4173ec8d-1229-47db-96de-06d87147e07e/5_1_system_card.pdf
  • Project address for GPT-5.1

Comparison of GPT-5.1 and GPT-5 generation

PromptI'm feeling stressed and could use some relaxation tips.

PromptExplain BABIP and wRC+.

Application scenarios of GPT-5.1

  • Daily conversations and emotional supportGPT-5.1 Instant provides a warm and natural conversational experience, suitable for everyday communication and emotional support. It responds to users in a more human way and offers thoughtful advice.
  • Reasoning and Analysis of Complex ProblemsGPT-5.1 Thinking is designed for complex reasoning and can dynamically adjust thinking time, making it smarter and more accurate when dealing with complex problems. It is suitable for academic research, technical challenges and other scenarios.
  • Programming assistance and code generationIn programming tasks, GPT-5.1 provides more accurate code suggestions and logical analysis, especially excelling in math and programming assessments, making it suitable for developers to quickly solve problems.
  • Creative writing and content creationGPT-5.1 can generate creative and engaging text, supporting story creation, copywriting, and providing creators with inspiration and content support.
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