Where to bowl next

The next over.

Twelve reviews closed. The LLM world is wider than what one course can hold. Here are four places to keep playing — chosen by us, free where it says so.

1. Anthropic's prompt engineering guide

   The clearest first reference for writing better prompts. Honest, no hype, written by people who build LLMs every day.

   free reference
   ↗ docs.anthropic.com
2. OpenAI's prompt engineering guide

   The other half of the picture. Same techniques, different examples, occasionally different recommendations. Read both and triangulate.

   free reference
   ↗ platform.openai.com
3. OpenAI Evals

   An open framework for testing LLMs against fixed benchmarks. The natural next step after Review 11. Watch a few existing eval suites before you write your own.

   free practice
   ↗ github.com
4. Anthropic Cookbook

   Practical patterns: agents, tool use, RAG, evals, structured output. Each recipe is one Jupyter notebook you can clone and adapt.

   free practice
   ↗ github.com

We left a lot off this list on purpose. Four things you'll actually use beat fifty you'll skim. If something brilliant is missing, tell us — we'll review it for the next refresh.