16th October 2025
Tool
OpenAI Prompt Caching Playground
— Explore OpenAI's prompt caching feature by testing different prompt structures and observing cache hit rates across multiple requests. This interactive playground lets you compose system instructions, document context, and user questions, then send them to the Chat Completions or Responses API to track how cached tokens reduce costs and improve performance.
Recent articles
- The new GPT-5.6 family: Luna, Terra, Sol - 9th July 2026
- sqlite-utils 4.0, now with database schema migrations - 7th July 2026
- sqlite-utils 4.0rc2, mostly written by Claude Fable (for about $149.25) - 5th July 2026