Field Signal · Curated Reading
The Engineering
Signal.
High-signal field notes, architecture teardowns, and engineering writing from 50 publications. A focused reading queue for becoming a stronger end-to-end engineer. Updated 23 Aug.
Trace & Evaluate your Agent with Arize Phoenix
Open the source for the full engineering note.
Supporting sellers with enhanced product listings
Mercari leverages GPT-4o mini and GPT-4 to streamline selling, enhance product listings, and boost sales, transforming the online marketplace with features like AI Listing Support and Mercari AI Assistant.
OpenAI GPT-4.5 System Card
We’re releasing a research preview of OpenAI GPT‑4.5, our largest and most knowledgeable model yet.
Building an autonomous financial analyst with o1 and o3-mini
Endex builds the future of financial analysis, powered by OpenAI’s reasoning models.