1. What is a language model?
Large language models predict the next token given context. They approximate patterns; they are not databases.
12 min
AI Fundamentals
Core concepts behind modern assistants, tokens, and models. · Available · Beginner · 2–3 hours
Progress table doodbrain_academy_progress prepared. No fake certificates.
2. Tokens and context windows
Text is split into tokens. Context length limits conversation, memory, and documents in one request.
15 min
3. Instructions vs chat
System guidance shapes style. User messages carry the task. Keep instructions short on small models.
10 min
4. Hallucinations
Models can invent details. Verify critical facts.
12 min
5. Local vs cloud models
DoodBrain Free uses local open-weight models. Pro labels need provider keys.
15 min
6. Next steps
Continue with Using DoodBrain, then Prompt Engineering.
8 min