AI reference
Clear AI definitions and model data you can check.
A glossary written for practitioners, research summaries, and language models compared on price, limits and capabilities, with a source and a date next to every number.
Glossary
254 terms · A–Z
Definitions first, then how it works, worked examples, formulas and code.
LLM API pricing
71 models · 5 vendors
Per-token prices from each vendor's own page, with cache, batch and long-context rates.
Models
17 model cards · 9 comparisons
Context windows, limits and capabilities, with the source behind each value.
Tools
Token counter · cost calculator
Count the tokens in your prompt, then see what a month of traffic costs on every model.
LLM changelog
33 changes · last Oct 26, 2026
Model launches, price changes and retirements, each linked to the vendor's notice.
News and research
136 articles
Pricing news, research summaries and applied machine learning explainers.
Paying for a chat app rather than the API? See chatbot subscription plans.
Fresh in the reference
Recently updated in the glossary
Featured guides
- FeaturedResearch
Genetic Algorithms Explained: How They Work, Examples and Python Code (2026)
A genetic algorithm (GA) is a search method that evolves a population of candidate solutions using selection, crossover and mutation. It treats optimization like natural…
- FeaturedResearch
AI Algorithms for Image Recognition: From CNNs to Vision Transformers, YOLO and SAM
Image recognition is the ability of software to identify what is in an image or video frame: which objects are present, where they are, and sometimes exactly which…
- FeaturedAI Education
AI in Education (2026): What Works, What the Evidence Shows, and What Schools Should Do
AI in education means using artificial intelligence, mostly chatbots and tutoring systems built on large language models, to help students learn and teachers teach. By…
Latest articles
All 136 articles
The EU AI Act Explained: Risk Categories, Deadlines After the 2026 Omnibus, and Fines
The EU AI Act is the European Union's law on artificial intelligence, Regulation (EU) 2024/1689. It sorts AI uses by the harm they can cause: a short list of practices is banned outright, a longer list of "high-risk" uses must meet strict…
- AI Education
The History of Artificial Intelligence: From Turing to the LLM Boom
- AI Education
How Does AI Work? A Plain-English Guide, From Training to the Answer on Your Screen
- AI Education
Types of AI: The 3, 4 and 7 Types Explained, and Which Ones Actually Matter
- AI Education
The Best ChatGPT Alternatives in 2026: Free and Paid AI Chatbots Compared
- Research
AI in Medicine (2026): What Happened to the 'Medical Revolution' and What Works Now
- AI Education
Machine Learning vs Deep Learning: The Real Differences and When to Use Each (2026)
- Research
Self-Driving Cars in 2026: How They Work, Who Leads, and How Safe They Are
- AI Education
Best Open-Source LLMs in 2026: The Top Open-Weight Models Compared
- AI in business
AI in Law: How Lawyers and Courts Use It, What Works and the Risks (2026)
- AI in business
Will AI Replace Jobs? What the Data Actually Shows in 2026
- AI Education
WebMCP Explained: What It Is, How It Works and How to Add It to Your Website (2026)
- Research
People Are Blurring Their Fingers in Selfies. Can AI Really Steal Your Fingerprints From a Photo?