prompt
/prɑmpt/
definition
the text you give an ai model to tell it what you want. it can be a
question, an instruction, examples, or all of them at once.
plain
what you type into the ai. the clearer and more specific you are,
the better what comes back.
in context
"tighten the prompt." → say more exactly
what you want, and what you don't, so the ai stops guessing.
token
/ˈtoʊkən/
definition
the unit an ai model reads and writes in. a token is a chunk of
text, often a few characters or part of a word, not a whole word.
plain
ai doesn't count words, it counts tokens, little pieces of words.
usage limits and pricing are measured in them.
in context
"that's about 1,000 tokens." → roughly 750
words of text going into or out of the model.
context window
/ˈkɑntɛkst ˈwɪndoʊ/
definition
the most text a model can take in at once, measured in tokens,
counting both your input and its reply.
plain
the model's short-term memory. fit your stuff inside it and the
model sees all of it; go over and the oldest parts fall off.
in context
"it has a 200k context window." → it can
keep around 150,000 words in view at one time.
hallucination
/həˌluːsəˈneɪʃən/
definition
when a model produces information that is false or made up while
presenting it confidently as fact.
plain
the ai making something up and sounding sure about it. it isn't
lying, it's filling a gap with plausible-sounding text.
in context
"double-check it, models hallucinate citations."
→ it might invent sources, quotes, or numbers that look real but
aren't.