OpenAI Engineering Blog & Tech Articles
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39 engineering articles, tutorials, and technical insights from OpenAI's engineering team
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One user turn can contain many model and tool iterations. Any cost inside the repeated region can be paid many times.
OpenAI Team
9 min read
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By Justin Uberti and Zahan Malkani, Members of Technical Staff
OpenAI Team
7 min read
Includes Code
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Using population-level analysis to debug tricky crashes in our data infrastructure.
OpenAI Team
19 min read
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OpenAI Team
9 min read
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OpenAI Team
11 min read
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By Members of Technical Staff: Aravind Srinivasan & Samay Shamdasani (Thrive Holdings), Arthur Fernandes Araujo & John de Wasseige (OpenAI)
OpenAI Team
13 min read
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By David Wiesen, Member of Technical Staff
OpenAI Team
17 min read
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MRC’s support for multi-plane networks means we can connect over a hundred thousand GPUs with only two tiers of switches. This reduces the power required, the number of components that can fail, and the total cost of the network compared to conventional approaches.
OpenAI Team
13 min read
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By Yi Zhang and William McDonald, Members of Technical Staff
OpenAI Team
15 min read
Includes Code
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By Alex Kotliarskyi, Victor Zhu, and Zach Brock
By Brian Yu and Ashwin Nathan, Members of the Technical Staff
OpenAI Team
14 min read
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By Bo Xu, Danny Zhang, and Rohit Arunachalam
ChatGPTCloudflare WorkersengineeringGitHub ActionsJavaScriptNext.jsNode.jsOpenAI APIPythonReactTypeScriptVite
OpenAI Team
20 min read
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OpenAI Team
7 min read
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The article discusses the evolution of access control for OpenAI's Codex and Sora, focusing on the challenges of rate limits and the implementation of a real-time access engine that integrates usag...
Jonah Cohen
7 min read
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OpenAI Team
9 min read
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OpenAI's Harness team built and shipped an internal beta product with zero lines of manually-written code over five months, using Codex agents exclusively.
This article explains how OpenAI built the Codex App Server, a bidirectional JSON-RPC API that serves as the critical link between the Codex harness (agent loop and logic) and various client surfac...
Celia Chen
14 min read
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OpenAI built a bespoke internal AI data agent powered by GPT-5.
Bonnie Xu
13 min read
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This article explains the core agent loop architecture behind OpenAI's Codex CLI, detailing how it orchestrates interactions between users, LLM models, and tools to perform software engineering tas...
Michael Bolin
17 min read
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OpenAI Team
14 min read
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OpenAI details how they scaled PostgreSQL to support 800 million ChatGPT users, achieving millions of queries per second through a single-primary architecture with nearly 50 read replicas across mu...
Bohan Zhang
13 min read
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OpenAI Team
5 min read
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OpenAI Team
10 min read
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The article discusses the development of the Sora Android app, which was built in 28 days using Codex.
OpenAI Team
13 min read
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Inside our new process architecture, which gives you a faster, smarter way to use the web.
OpenAI Team
8 min read
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OpenAI Team
9 min read
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OpenAI Team
2 min read
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