Reference
AI Glossary
Plain-language definitions for models, prompts, context, agents, tools, retrieval, and evaluations.
Core concept
CurrentNext review due 2026-10-21Content version 0.30.0
- Format
- Reference
- Level
- Beginner
- Audience
- Learner, Practitioner
- Owner
- Project42 Editorial
- Review cadence
- Every 90 days
- Prerequisites
- None
01
Core terms
Model: a system that generates or evaluates outputs from learned patterns and current input.
Prompt: instructions and context supplied to a model.
Context window: the limited working material available for one interaction.
Agent: a model-driven system that can select tools and act in a loop.
Evaluation: a repeatable method for measuring output against explicit criteria.