Forte Labs – Praxis Blog

Introducing The AI Second Brain

After the release of ChatGPT, Tiago Forte halted his Building a Second Brain cohorts, recognizing that traditional PKM methods were becoming obsolete. In February 2026, OpenAI and Anthropic unveiled agent‑harness models that can read files, use tools, and act on a computer, delivering persistent memory and real‑world execution. Forte frames this as the realization of a cognitive exoskeleton and announces a three‑week, cohort‑based AI Second Brain training program launching April 15. The initiative targets mid‑career professionals seeking to leverage AI as a thought partner rather than a replacement.