Start with Anthropic + OpenAI
Each vendor has its own free training catalog — Anthropic Academy and OpenAI Academy. They teach you how to use Claude or GPT-5 in their own house style. Run both before the PickBits expansion tracks; the cross-vendor gaps we catalog only become visible once you've seen each vendor's defaults.
Anthropic Academy
Anthropic Academy teaches you how to use Claude. PickBits picks up after — anti-patterns, decision frameworks, and fleet-ops wisdom for running real agents in production.
OpenAI Academy
OpenAI's training catalog and Cookbook teach you GPT-5, Codex, the Responses API, and the Agents SDK. Different model family, different idioms, similar discipline. The cross-vendor gaps PickBits catalogs only become visible once you've seen each vendor's house style.
// done? pick your track
The fleet-ops layer no vendor teaches starts in the PickBits tracks. Pick one.