AI & ML Research 24 Hours

Last updated: September 13, 2026, 2:21 PM ET

Model Deployment & Reliability

Perplexity now relies on GPT-6 Astra to draft communications, modify software, and monitor production systems, checking in far less often than with earlier models. Meanwhile, a churn prediction model shipped via Fast API and Docker surfaced everything that broke between "it runs" and "it's live."

Measurement & Causal Inference

A practitioner's guide shows how to estimate what an opt-in AI feature actually did when nobody randomized the rollout, arguing the apparent adoption lift is largely a selection effect.