ChatGPT Custom GPTs: Best Practices for Building and Prompting
How to build Custom GPTs that actually work — effective system prompts, instructions, knowledge files, and actions that make your GPT reliable and useful.
GPT-4o vs o1 vs o3: Which OpenAI Model to Use When
A practical decision guide for choosing between OpenAI's models — GPT-4o, o1, o3, and o3-mini. When each model is the right tool and when it's the wrong one.
Prompt Caching: How to Cut AI API Costs by 80% (Anthropic + OpenAI)
A practical guide to prompt caching on Anthropic and OpenAI APIs — how it works, what it saves, and the patterns that maximize cache hit rates in production.
