The Beginner’s Roadmap to Different Types of AI Models

LaMDA, GPT, and their cousins seem to be stealing the spotlight everywhere—and honestly, it’s not hard to see why. New types of AI models are popping up faster than coffee orders on a Monday morning, working their way into industries left and right. Businesses increasingly turn to AI development services to develop models able to simplify operations, service customers, and tackle problems that might leave most humans at a loss.

Yet, with all the chatter about how revolutionary they are, there’s surprisingly little focus on the “how” and “why.” Why do these models excel in certain scenarios but fail in others? How do they make decisions, and—most importantly—can we trust those decisions when high stakes are involved?

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If you’re ready to dig deeper and uncover the answers, read on. This article breaks it all down.

What is an AI Model?

Now, it’s hard to think of any industry that doesn’t lean on AI in some way. In this era of “big data,” consider the vast volumes of information we amass. Processing this data would be a Herculean task without AI’s assistance. Looking ahead, the integration of intelligent machines into various sectors is set to deepen, making it crucial for professionals in different fields to pinpoint the AI model types that best suit their industry’s demands. 

But before we dive into the types of AI models available today, let’s first unpack what is an AI model. It is a program trained on a set of data to recognize patterns or make decisions without further human intervention. It applies different algorithms to relevant data inputs to achieve the tasks or output it’s been programmed for.

it’s been programmed for.

The Evolution of AI Models

Back in the early days of AI, things were pretty hands-made. Researchers and engineers had to manually create algorithms, designing them to pull out the bits of data they needed. These algorithms were based on what the experts knew and felt was right, and each one was made for specific tasks. But this approach had its problems.   It struggled with large amounts of data – a challenge known as the “curse of dimensionality.” Also, scaling up these algorithms for bigger, tougher tasks was really hard. 

Then came deep learning models, and they completely changed how artificial intelligence worked. Instead of relying on explicit instructions, these models figured things out directly from data. Using layers of artificial neurons and a process called backpropagation, they became incredibly effective in complex tasks like image, speech and language recognition, and even gaming. 

However, deep learning models had their own limitations—they required vast amounts of labeled data to perform effectively. Collection and annotation of such data was both costly and time-consuming. To address this, experts introduced techniques like pre-training and fine-tuning.

Pre-training uses a neural network trained on vast, often unlabeled datasets to grasp general patterns. Fine-tuning minimizes the need for extensive labeled training data, letting the model be used directly or adjusted further for specific tasks.

Most recently, models like the GPT-4 language model, DALL-E, and MidJourney have taken center stage in both AI and data science. They’re good at creating content that mimics human intelligence, like texts and images.

AI research is moving toward building AI systems that can learn and adapt independently, with minimal human involvement. These autonomous systems will continue to improve, making decisions in complex situations. Key components of autonomous AI include reinforcement learning, learning from human feedback, generative AI, self-supervised and active learning.

Reinforcement learning lets AI know from trial and error, and self-supervised learning finds patterns in data without clear instructions. Active learning helps models pick the best data to learn from, so it doesn’t need as much to train.

Most Widespread Types of AI Models

In the next section, we will explore the most popular AI models, highlight key examples, and examine their most important characteristics.

Supervised Learning Models

Supervised learning involves teaching models via pre-labeled datasets. You provide examples, and the AI learns a rule to predict the labels for new data. Essentially, you give the model historical data and ask it to identify patterns to predict future outcomes.

There are two main types of supervised learning: regression and classification. Regression tries to guess an outcome based on what it knows, even when there are lots of possible answers. Classification sorts data into different categories based on which one it thinks is most likely.

Linear Regression

Linear Regression is a common type of supervised learning used a lot in statistics. It looks at the link between what you put in and what you get out. In simple terms, it predicts one thing based on another.

Decision Trees

The Decision Tree model is like a map that helps you decide based on past choices. It’s straightforward, really popular, and gets its name because it splits data up in a way that looks like a tree, with branches leading to different conclusions.

Random Forest

Random Forest is a model used for sorting data (classification) and making accurate predictions (regression). It relies on multiple decision trees, with each tree trained on different subsets of data. The model combines results and answers through a bagging method, which improves overall accuracy.

Source: Wikipedia 

Neural Networks

One of the most popular AI/ML models, Neural Networks, is set up a bit like the human brain, with lots of layers and connections called artificial neurons. These networks excel at tasks requiring pattern recognition, such as speech analysis, object identification, and language comprehension.

Support Vector Machines (SVM)

SVM is a fast and effective model, especially when data is limited. It excels at sorting data into two groups (binary classification). While newer methods like neural networks exist, SVM remains quicker and more efficient with small datasets, such as text classification. As a type of supervised learning, SVM helps group items, detect outliers, and predict values.

values.

Unsupervised Learning Models

AI models can also be made using unsupervised machine learning. This method involves more automatic steps. The models are trained by programs, often in ways that kind of copy how humans would train them. Artificial intelligence models created this way are typically used to analyze and interpret unstructured data. They help summarize data, sort information, and identify patterns or rules within it.

K-Means Clustering

K-Means Clustering is a basic kind of unsupervised learning algorithm. It’s used to split a bunch of data into different groups or clusters. These groups are made based on how similar the data points are to each other. You’ll see it used in cases like customer segmentation and image compression.

Hierarchical Clustering

Hierarchical Clustering is another way to group data. It’s different from K-Means because it sorts data into a sort of family tree of clusters. You can actually see how the data groups up, step by step. This sort of AI transparency is really handy when you have data that’s kind of layered or has levels to it.

Principal Component Analysis (PCA)

Then there’s Principal Component Analysis, or PCA. It simplifies complex data while retaining the key elements. PCA identifies the most important parts of a dataset and compresses them, which makes the data easier to handle. This approach is useful for tasks like data visualization and noise reduction.

Generative Adversarial Networks (GANs)

GAN is one of the AI-generated models that generates its output by drawing parallels with the input patterns it observes. By doing so, the artificial intelligence model produces the output that could plausibly be produced based on the same input.

Reinforcement Learning Models

Here, things get a bit more interesting. If you ask how to train an AI model of such type, this runs through trial and error, rewarding them when they make the right decisions.

Q-learning

Q-learning is a key method in Reinforcement Learning. It focuses on improving through actions and outcomes. The model explores various options, evaluates results, and adapts based on the feedback it receives.

Deep Q Networks (DQNs)

Then, there are Deep Q Networks or DQNs. Think of them as a smarter version of Q-learning. They use deep learning, which means they can handle more complex problems and make better decisions.

Policy Gradient Methods

Last, we have Policy Gradient Methods. These use a different approach to AI modeling. Instead of focusing solely on past actions, they identify the optimal policy—a set of rules or strategies to guide decisions.

Source: IBM

Pre-trained and Transfer Learning Models

Next up are pre-trained and transfer learning models, which are valued for their ability to save both time and effort.

BERT and Natural Language Processing

Take BERT, for instance, which is short for Bidirectional Encoder Representations from Transformers. It’s a complex term, but it transforms how machines interpret human language. BERT enables computers to grasp the context of our words, improving tools like search engines significantly.

Computer Vision with ResNet and VGG

In computer vision, ResNet and VGG stand out for their ability to teach machines to analyze and interpret visual data. These models handle challenges such as face recognition and scene analysis and transform the way computers “see” the world.

These AI models examples demonstrate the cutting-edge capabilities of modern artificial intelligence. Now, let’s take a look at how these models are applied across various industries. 

Applications of AI Models

Some studies predict that AI-generated models could add an impressive 14% to 16%—equivalent to nearly $15 trillion—to the global economy by 2030. But let’s be realistic: this kind of transformation won’t happen overnight. Like any significant technological shift, the adoption of AI requires strategic investments in infrastructure, such as high-performance computing systems and robust data storage solutions. Early adopters who prioritize these investments will likely reap the greatest benefits from the AI-powered economy of the future. 

But infrastructure alone isn’t enough. Equally crucial is addressing the talent gap by hiring skilled AI engineers who can develop and deploy innovative solutions for various industries.  

By the way, how are AI models reshaping the core industries we rely on?

Healthcare and AI

AI models power healthcare with capabilities that go beyond human limits. Vision models, for example, analyze medical images to catch early signs of diseases like cancer—often before symptoms appear. Predictive models crunch patient data to forecast potential risks, which allows doctors to intervene early. In pharmaceuticals, generative models accelerate drug discovery, identifying promising compounds in months instead of years.

Finance and AI

Financial institutions rely heavily on AI for processing and analyzing data at speeds humans can’t match. Algorithmic trading platforms use predictive and machine learning models to execute trades based on real-time market trends. Fraud detection systems powered by AI identify suspicious activities before they escalate. Lending decisions also benefit from AI, which ensures fairer, more consistent assessments by considering a wider range of factors.

Entertainment and AI

Entertainment has embraced AI-generated models in both content delivery and creation. Language models like GPT and generative models are being used to write scripts, compose music, and even generate artwork. Recommendation systems, widely recognized types of AI models, analyze user behavior to suggest tailored content on platforms like Netflix and Spotify. In gaming, artificial intelligence models enhance gameplay by creating adaptive, intelligent non-player characters (NPCs) and designing procedurally generated levels for a richer player experience.

Transportation and AI

AI models drive efficiency in transportation and logistics. Autonomous vehicles rely on real-time decision-making from AI systems to navigate roads safely. Route optimization models help logistics companies cut delivery times and fuel costs. In warehouses, robotics equipped with AI streamline order picking, packing, and inventory management.

Retail and AI

Retail has embraced different types of AI models to create seamless shopping experiences. Recommendation systems, like the ones you see on Amazon or Netflix, tailor suggestions based on customer preferences. Predictive analytics forecast demand, preventing overstocking or shortages. Meanwhile, vision models revolutionize brick-and-mortar stores, enabling cashier-less checkouts and smart displays that respond to customer behavior.

Manufacturing and AI

Manufacturing industries use different AI models to optimize production lines and ensure quality control. Vision models inspect products for defects with unmatched accuracy, while predictive models anticipate maintenance needs, minimizing downtime. Generative AI also assists in the design process and creates prototypes and testing solutions digitally before physical production begins.

Energy and AI

The energy sector benefits from AI’s ability to manage resources intelligently. Predictive models assess weather conditions to optimize energy output from renewable sources like wind and solar. Smart systems monitor grids for inefficiencies or potential failures, which ensures consistent delivery while reducing waste.

Final words

What’s next? While we’re far from sci-fi scenarios, today’s level of software development offers highly practical AI applications for businesses. Need to analyze large datasets to drive better decisions? AI can uncover patterns, trends, and insights that are nearly impossible to identify manually. However, identifying the right AI/ML models or the most suitable programming languages is rarely a simple task—especially without specialized expertise.

The best starting point? Partner with a team skilled in AI solutions, like Relevant. Our experts understand the complexities of AI systems and can guide you in the most effective approaches for your business goals. With the right support, implementing AI doesn’t need to be overwhelming—it can be transformative. 

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