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
255 terms · A–Z
Definitions first, then how it works, worked examples, formulas and code.
LLM API pricing
65 models · 5 vendors
Per-token prices from each vendor's own page, with cache, batch and long-context rates.
Models
10 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
27 changes · last Oct 14, 2026
Model launches, price changes and retirements, each linked to the vendor's notice.
News and research
132 articles
Pricing news, research summaries and applied machine learning explainers.
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Fresh in the reference
Recently updated in the glossary
Featured guides
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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…
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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…
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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 132 articles
AI in Medicine (2026): What Happened to the 'Medical Revolution' and What Works Now
In 2022, this page ran under the title "Artificial intelligence is shaping a new medical revolution". It was built on four stories: an AI called BioMind beating 15 senior doctors in a Beijing contest, a University of Exeter model…
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Machine Learning vs Deep Learning: The Real Differences and When to Use Each (2026)
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Self-Driving Cars in 2026: How They Work, Who Leads, and How Safe They Are
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Best Open-Source LLMs in 2026: The Top Open-Weight Models Compared
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AI in Law: How Lawyers and Courts Use It, What Works and the Risks (2026)
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Will AI Replace Jobs? What the Data Actually Shows in 2026
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WebMCP Explained: What It Is, How It Works and How to Add It to Your Website (2026)
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People Are Blurring Their Fingers in Selfies. Can AI Really Steal Your Fingerprints From a Photo?
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AI Agents: What They Are, Types, What They Can Do and How to Set One Up (2026)
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Prompt Engineering: What It Is, Techniques and Examples (2026)
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AI in Social Media (2026): How Algorithms, AI Content and Moderation Really Work
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AI in Finance and Banking (2026): What Works, What the Evidence Shows, and the Risks
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Best AI Courses in 2026: Free and Paid, Compared (Independent Guide)