# Top X creators

> Free resources, with credit to the original creators.

## Resources
- [Andrej Karpathy on X](/top-x-creators/practitioners/x-andrej-karpathy/index.md): AI explanations and practical model-use observations from a neural-network educator. (beginner; West; closed resource; by Andrej Karpathy)
- [Chip Huyen on X](/top-x-creators/practitioners/x-chip-huyen/index.md): AI system-design notes that connect model behavior, tools and production choices. (intermediate; West; closed resource; by Chip Huyen)
- [Eugene Yan on X](/top-x-creators/practitioners/x-eugene-yan/index.md): Applied AI systems and evaluation lessons from a practitioner’s public technical writing. (intermediate; West; closed resource; by Eugene Yan)
- [Simon Willison on X](/top-x-creators/practitioners/x-simon-willison/index.md): Practical LLM experiments and software-building notes, with links back to detailed write-ups. (intermediate; West; closed resource; by Simon Willison)
- [Lilian Weng on X](/top-x-creators/practitioners/x-lilian-weng/index.md): Research-oriented learning notes on model training, reasoning and agent harnesses. (advanced; West; closed resource; by Lilian Weng)