In OpenAI’s recent Summer Update, the GPT-5 model family took center stage. Among the bold claims was a new milestone: GPT-5 pushed the limits of agentic tool calling – the ability to reliably use external APIs, databases, and services. This capability has been measured with the newly released Tau² benchmark, which aims to evaluate how well AI agents perform in realistic, tool-driven scenarios. Immediately after seeing this slide, I started having questions. First of all, what are these Telecom,...