Build time: API and codex
Build time: API and codex
Author: OpenAI – Duration: 01:00:59
Create agent-powered workflows for real engineering work with Codex and OpenAI APIs. During this Build Hour, you'll learn how teams are moving beyond pair programming to agentic delegation, where AI systems can take on entire engineering tasks, from planning to execution. Charlie Guo (DevEx), Ryan Lopopolo (Future of Work), Mitch Troyanovsky (co-founder, Basis) explain how to: • Ship new features faster using the Codex, with real examples from Basis: https://www.getbasis.ai/
• Build agent-driven systems using new API features such as hosted shell, skills, and websockets. • Evaluate and improve agents using the Agent Legibility Score framework. • Apply harness engineering techniques to make agent workflows reliable in production. • Use GPT-5.4 for large-context reasoning, IT usage tasks, and tool-based agent workflows. https://developers.openai.com/codex
👉API Documents: https://developers.openai.com/api/docs
👉 Harness Engineering Blog: https://openai.com/index/harness-engineering/
👉GPT-5.4 Blog: https://openai.com/index/introducing-gpt-5-4/
👉 Follow the code repository: http://github.com/openai/build-hours
👉 Sign up for upcoming live build times: https://webinar.openai.com/buildhours
00:00 Introduction 01:58 What's New: Codex 05:01 What's New: API 08:33 Demo: Agent Readability Score 21:53 Harness Engineering 32:32 Customer Spotlight: Base 47:57 Q&A
