Official Course
Intermediate
★ Featured
Hugging Face · Large Language Models
Hugging Face's official course covering Transformer architectures, fine-tuning, and the Transformers ecosystem. Completely free and widely recommended.
Official Course
Intermediate
Hugging Face · Large Language Models
A systematic walkthrough of LLM architecture, tokenization, pretraining, alignment, and inference optimization, with runnable experiments. All free.
Official Docs
Intermediate
★ Featured
OpenAI · Large Language Models
OpenAI's official API documentation covering model capabilities, function calling, structured outputs, and best practices. The primary source for API-driven development.
Official Docs
Intermediate
OpenAI · Large Language Models
OpenAI's official collection of runnable examples for common scenarios such as RAG, Agents, and function calling. Learn by copying.
Official Docs
Intermediate
Anthropic · Large Language Models
Official Claude API documentation covering the Messages API, tool use, MCP, and prompt engineering. Exceptionally well written.
Official Docs
Intermediate
Google · Large Language Models
Official Gemini API docs and tutorials, including free tiers, multimodal capabilities, and a getting-started guide for Vertex AI.