2.1 What is Generative AI?

Before discussing genAI, we should consider it in the context of the long history of AI.

What is Artificial Intelligence (AI)?

Artificial intelligence (AI) is the theory and development of computer systems capable of performing tasks that normally require human intelligence, such as interpreting language, recognizing patterns from large amounts of data, and making decisions. Some of the names given to AI, based on the way in which it is designed and what it can do, include neural networks, natural language processing, computer vision, speech recognition, machine learning, and deep learning.

Take a look at the timeline in Figure 2.1.1 to explore a selection of the key advances in AI.

While we interact with AI everyday, usually it hides in the background of the technologies we use. GenAI is different in that we can use our voice and text to command the technology to produce content (a.k.a. as output) that we would normally have to create ourselves.

Miao and Holmes (2023) define genAI as follows:

Artificial Intelligence (AI) technology that automatically generates content in response to prompts written in natural language conversational interfaces. Rather than simply curating existing webpages, by drawing on existing content, genAI actually produces new content. The content can appear in formats that comprise all symbolic representations of human thinking: texts written in natural language, images (including photographs to digital paintings and cartoons), videos, music and software code. GenAI is trained using data collected from webpages, social media conversations and other online media. It generates its content by statistically analyzing the distributions of words, pixels or other elements in the data that it has ingested and identifying and repeating common patterns (for example, which words typically follow which other words).

Figure 2.1.2 can help us visualize how genAI fits within the broader developments in AI.

While OpenAI’s ChatGPT was the first large language model to be popularized, other notable text and code generating models, known as frontier models, have been released, namely, Google’s Gemini (formerly Bard), and Anthropic’s Claude, and Meta’s Llama, along with open source models like Mistral/Mixtral.

At this writing, ChatGPT 4 is considered the gold standard, with both Gemini (select versions) and Claude achieving GPT 4-level performance in 2024 (Mollick, 2024).  In addition, image-generating models, such as DALL-E, Stable Diffusion, Stable Cascade, and Midjourney offer text-based command modes for creating custom images.  OpenAI has also released Sora, which can create realistic videos from text commands. The models are rapidly evolving and new versions are released every few months. Each model and application displays differing strengths and capabilities as noted by end-user testing (see the work of Ethan Mollick in particular). In addition, given the rapid developments occurring in the field of genAI, the models and applications are evolving equally rapidly, while new ones are being released.

OpenAI’s ChatGPT draws from a genAI model that was trained on a large number of datasets and documents available on the internet to identify and predict how language works (how to create sentences). The GPT in ChatGPT stands for “Generative Pre-trained Transformer”, referring to a type of machine learning involving a neural network  in which a computer learns to perform a task by analyzing training examples. For example, the training data used by ChatGPT 3.5 is a dataset that includes 570GB of data from sources like books, Wikipedia, articles, and other pieces of writing on the internet up to 2021 (Gupta, 2023). The GPT model learned the probability that one word (or a part of a word also known as a token) should follow another, based on context or conversation topic. This ability to predict sentence patterns enables it to generate outputs that seem surprisingly “human” – conversational and coherent.

Users engage with the genAI in the form of a written or verbal conversation often referred to as prompts. The GPT acquired the conversational ability through a process of “Reinforcement Learning with Human Feedback (RLHF) – a method that uses human demonstrations and preference comparisons to guide the model toward desired behaviour” (OpenAI). Essentially, RLHF involves using human feedback to train the model in giving outputs that are socially acceptable—imperfect though they may sometimes be.

Fundamentally, tools like Copilot, ChatGPT, Gemini, etc. are designed to employ your prompts to generate a response based on context and conversational topic. You ask questions (prompts), upload reference images or documents, and ask follow-up questions to fine-tune the GenAI’s responses until you obtain output or content that meets your needs.

Figure 2.1.3 Caveats: Use caution when using genAI.

Interestingly, giving the same prompt to the same genAI tool does not always produce the same result. Each time a tool like Copilot or Claude is prompted, it often creates a new output. While there will probably be similarities between outputs from the same prompt on the same topic, they will not be identical. This is even more apparent when you use the same prompt across multiple AI products.

GenAI is evolving as we write, and capabilities increase with each version of the models that are released. Below you will find a list of basic capabilities for text-based modalities that form the basis for more complex multimodal capabilities being released. These multimodal capabilities in ChatGPT, Gemini, and Claude include the following:

• Verbal capabilities: Interact with the user verbally using natural language, cadence, tone, and pace.
• Visual capabilities: Make use of the user’s camera to engage with dynamic visual elements in the world (not just photos and documents).
• Emotion and facial expression detection: Interpret facial expressions and identify emotions.
• Memory: Remember your conversations unless settings have been adjusted so that it does not do so.

Seneca Libraries offers an overview of genAI that covers a description, uses, basic prompting, and citation practices: Generative Artificial Intelligence

Also take a look at this video, Introduction to AI for Teachers and Students, by Ethan Mollick and Lilach Mollick of the Wharton School at the University of Pennsylvania. These pioneers in the use of genAI make the topic easy to understand.

Attributions

This page has been edited and remixed from the following sources. Supplemental information has been provided by Robin L. Potter.

Center for Faculty Development and Teaching Innovation.  (2023) What is Generative AI? Centennial College. What is GenAI? – Generative Artificial Intelligence in Teaching and Learning (pressbooks.pub)   CC by 4.0.

Coley, M., Snay, P., Bandy, J., Bradley, J., Molvig, O. (2023). Teaching in the Age of AI. Vanderbilt University Center for Teaching. https://cft.vanderbilt.edu/guides-sub-pages

Elkhoury, E. and Prud’homme-Généreux, A. Future Facing Assessments by  is licensed under CC BY 4.0

Hu, K. (2023). ChatGPT sets record for fastest-growing user base – analyst note | Reuters

Paul R MacPherson Institute for Leadership, Innovation and Excellence in Teaching. (2023). Generative Artificial Intelligence in Teaching and Learning at McMaster University  McMaster University. CC by 4.0.

Miao, F. and Holmes, W. (2023).  5.2 A ‘human-centred and pedagogically appropriate interaction’ approach. Guidance for generative AI in education and research. UNESCO. unesdoc.unesco.org/ark:/48223/pf0000386693/PDF/386693eng.pdf.multi CC by 3.0.

OpenAI. (2024). How does ChatGPT work? What is ChatGPT? | OpenAI Help Center

The University of Queensland Brain Institute. (n.d.). The history of artificial intelligence. Image. The University of Queensland. History of Artificial Intelligence – Queensland Brain Institute – University of Queensland (uq.edu.au)

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Gupta, A. (2023, April). What is ChatGPT and how was it trained? – Paperpal Blog | Paperpal

Mollick, E. and Mollick, L. (2023). Practical AI for instructors and students Part 1: Introduction to AI for teachers and students. https://youtu.be/t9gmyvf7JYo?si=wWzwn8DsSd1FUxWN

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