Framework · 2 notes · discussed by Chip Huyen, Lenny Rachitsky

Reinforcement Learning from Human Feedback

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Lenny’s Newsletter♥ 528

An AI glossary

Jun 24, 2025 · 14 min
Subscriber post — summary only

A glossary explaining 20+ common AI terms in simple language, from models and LLMs to transformers, training, RLHF, RAG, evals, agents, and hallucinations. It aims to help readers follow AI conversations in meetings and…

Lenny’s Podcast102 min

Al Engineering 101 with Chip Huyen (Nvidia, Stanford, Netflix)

Chip Huyen · Oct 23, 2025
Key learnings
  • Focus on what actually improves AI apps, such as talking to users, improving data, writing better prompts, and optimizing…
  • Be cautious about committing to newly released technologies that have not been widely tested, since switching away from them…
  • Fine-tuning and post-training can shape model behavior a lot, and many teams now focus effort there because base pre-training…