ChatGPT is a chatbot that can interact with users in a natural and engaging way. It is powered by a large language model called GPT-3.5, which was trained on billions of words from the internet. ChatGPT can answer follow-up questions, admit its mistakes, challenge incorrect premises, and reject inappropriate requests. It can also generate creative and informative content, such as poems, stories, code, essays, songs, and more.
What is ChatGPT?
ChatGPT is a chatbot that was launched by OpenAI on November 30, 2022. It is a sibling model to InstructGPT, which is trained to follow an instruction in a prompt and provide a detailed response. ChatGPT is trained to interact in a conversational way, using the dialogue format as the input and output.
ChatGPT is fine-tuned from a model in the GPT-3.5 series, which finished training in early 2022. GPT-3.5 is a generative pre-trained transformer model that can produce coherent and diverse text on various topics and domains. GPT-3.5 was trained on an Azure AI supercomputing infrastructure.
How does ChatGPT work?
ChatGPT works by using a neural network to predict the next word or token in a sequence of text, given the previous words or tokens. It uses a technique called attention to learn how to focus on the most relevant parts of the input and output. It also uses a technique called self-attention to learn how to relate different parts of the text to each other.
ChatGPT was trained using two methods: supervised fine-tuning and reinforcement learning from human feedback (RLHF). Supervised fine-tuning involves providing the model with human-written examples of conversations, in which the trainers play both sides: the user and the AI assistant. The trainers also use model-written suggestions to help them compose their responses. Reinforcement learning from human feedback involves collecting comparison data, which consists of two or more model responses ranked by quality. The trainers rank the responses based on criteria such as relevance, coherence, accuracy, fluency, and politeness. The model then learns to optimize its responses based on these rankings.
What can ChatGPT do?
ChatGPT can do many things that a human conversational partner can do, such as:
- Answering questions on various topics, such as science, history, sports, entertainment, etc.
- Providing information or advice on specific domains, such as travel, health, education, etc.
- Generating creative and informative content, such as poems, stories, code, essays, songs, etc.
- Playing games or quizzes with the user
- Having casual or humorous chats with the user
- Expressing emotions or opinions
- Adapting to the user’s preferences or personality
What are the limitations of ChatGPT?
ChatGPT is not perfect and has some limitations that users should be aware of, such as:
- ChatGPT sometimes writes plausible-sounding but incorrect or nonsensical answers. This is because it does not have access to a source of truth during RL training and it may be misled by the supervised training data.
- ChatGPT is sensitive to tweaks to the input phrasing or attempting the same prompt multiple times. For example, given one phrasing of a question, the model may claim to not know the answer, but given a slight rephrase, it may answer correctly. This is because it may have memorized some phrases or patterns from the training data that trigger different responses.
- ChatGPT is often excessively verbose and overuses certain phrases, such as restating that it is a language model trained by OpenAI. This is because of biases in the training data (trainers prefer longer answers that look more comprehensive) and well-known over-optimization issues.
How to use ?
ChatGPT is available for free during the research preview period. Users can try it out at chat.openai.com. Users can also download and install the ChatGPT desktop application for Windows/Mac/Linux or use the ChatGPT app for iOS. Users can customize their chat settings by choosing different modes (balanced, creative, or precise), languages (English or others), and formats (text or voice). Users can also provide feedback to help improve ChatGPT.
Conclusion
ChatGPT emerges as an extraordinary innovation, seamlessly engaging users in natural conversations. Empowered by the remarkable GPT-3.5 language model, honed through exposure to countless words from the vast expanse of the internet, ChatGPT stands ready to answer inquiries, offer insights, generate captivating content, and create enjoyable dialogues. As with any creation, there are considerations to bear in mind. While ChatGPT’s prowess is undeniable, occasional instances of incorrect responses remind us of its evolving nature. It also mirrors our own idiosyncrasies – sensitive to phrasing nuances and occasionally delightfully verbose. The opportunity to explore ChatGPT at no cost during the research preview phase is a gift, accessible through chat.openai.com, or via the user-friendly ChatGPT app or desktop application. User feedback will undoubtedly fuel its growth and enhancement, a collective journey toward brilliance.”
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