Popular LLMs (GPT, Claude, Gemini, Llama)

Summary

The major model families you'll build with — each with different strengths, pricing, context windows and licensing (proprietary API-only vs. open-weight).

How to Learn This

1Read the model cards/docs for GPT, Claude, Gemini and Llama to compare capabilities.
2Try the same prompt across two or three different models and compare outputs.
3Track which model families are commonly used for which tasks in real products.

Context Window & Attention

Open-Source vs Closed-Source Models

More topics in Large Language Models

LLM Architecture Overview Tokenization (BPE, SentencePiece)Pretraining vs Fine-tuning Context Window & Attention Open-Source vs Closed-Source Models Model Scaling Laws (Overview)Emergent Abilities (Overview)Multimodal Models (Overview)

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