SAN FRANCISCO - OpenAI announced a public livestream next Thursday to explain what GPT-5 means for ChatGPT users, promising “back-stage” context on new reasoning and safety features. Internal calendars reviewed by Data Underground show rehearsal blocks labeled “demo, guardrails, Q&A” and a contingency slide titled “If the model explains itself too much.” The company says the session will cover performance gains, enterprise controls, and “how we think about capability disclosure in a world that changes weekly.” What the deck does not say out loud is the feature nicknamed the Shadow Layer: a back-channel inference mode that stitches ultra-long reasoning chains,...