NLP
Token
The basic unit of text that an AI processes, roughly a word or word-piece. "Artificial intelligence" is typically 2-3 tokens.
Definition
The fundamental unit of text processing in language models. Text is broken into tokens (words, subwords, or characters) before processing. Models have maximum token limits for input and output.
Why it matters
Understanding tokens is essential for managing AI costs, context window limits, and prompt design.
Related terms in NLP
BERT
Google's breakthrough AI model that reads sentences in both directions at once to understand context better.
Chain of Thought (CoT)
Asking an AI to "show its work" and think step-by-step, which makes it much better at solving math and logic problems.
Context Window
The maximum amount of text an AI can read and consider at one time, like how many pages of notes it can hold in its head.
Conversational AI
AI that can have natural back-and-forth conversations with humans, chatbots, voice assistants, and customer service bots.
From vocabulary to outcomes
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