keepUpAI
CoursesLeaderboardGuidesInvitePricing
Start freeYou
HomeGlossaryOverfitting

AI glossary

What is Overfitting?

When a model memorizes its training data and performs much worse on new data.

The tell-tale sign is a large gap between training and validation scores. The same idea applies to prompts tuned to a small eval set.

▶Practice it hands-onData Splits, Overfitting & Leakage

Related terms

Gradient Descent

← All 43 AI terms

keepUpAI

Hands-on AI engineering practice for students, developers and career-changers. Learn by doing, one fun step at a time.

Courses

  • All lessons
  • Foundations
  • Prompting & LLM APIs
  • Retrieval (RAG)
  • Agents
  • Evals & Production
  • ML for AI Engineers
  • Build an AI SaaS

Guides

  • All guides
  • How to Learn AI Engineering in 2026
  • What Is an AI Engineer
  • What Is RAG (Retrieval-Augmented Generation)
  • Prompt Engineering Guide
  • What Are AI Agents
  • What Is MCP (Model Context Protocol)

Glossary

  • All AI terms
  • RAG
  • Embedding
  • AI Agent
  • Prompt Injection
  • Temperature
  • MCP

keepUp AI

  • Leaderboard
  • Free tools
  • LLM cost calculator
  • Token counter
  • AI Engineer Toolkit
  • AI vs ML vs SWE
  • Pricing
  • Invite friends
© 2026 keepUp AI · Learn AI engineering by doing · Privacy · Terms