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.

256glossary terms
183articles
65models priced
next-token-prediction.py

Glossary

256 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

183 articles

Pricing news, research summaries and applied machine learning explainers.

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Fresh in the reference

Recently updated in the glossary

Latest articles

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AI in business

Will AI Replace Jobs? What the Data Actually Shows in 2026

The anxiety is real. In a Pew Research survey of 5,273 US workers published in February 2025, 52% said they feel worried about how AI may be used in the workplace in the future, 36% felt hopeful, and 32% expected AI to mean fewer job…