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 22 Aug.
GPT-5.1-Codex-Max System Card
This system card outlines the comprehensive safety measures implemented for GPT‑5.1-CodexMax. It details both model-level mitigations, such as specialized safety training for harmful tasks and prompt injections, and product-level mitigations like agent sandboxing and configurable network access.
Building more with GPT-5.1-Codex-Max
Introducing GPT-5.1-Codex-Max, a faster, more intelligent agentic coding model for Codex. The model is designed for long-running, project-scale work with enhanced reasoning and token efficiency.
A free version of ChatGPT built for teachers
ChatGPT for Teachers is a secure workspace with education‑grade privacy and admin controls. Free for verified U.S. K–12 educators through June 2027.
How Scania accelerates work with AI across its global workforce
Global manufacturer Scania is scaling AI with ChatGPT Enterprise. With team-based onboarding and strong guardrails, AI is boosting productivity, quality, and innovation.
Start building with Gemini 3
Open the source for the full engineering note.
We’re expanding our presence in Singapore to advance AI in the Asia-Pacific region
Google DeepMind opens a new Singapore research lab, accelerating AI progress in the Asia-Pacific region.
A new era of intelligence with Gemini 3
Open the source for the full engineering note.
Introducing Google Antigravity
Open the source for the full engineering note.
Intuit and OpenAI join forces on new AI-powered experiences
OpenAI and Intuit have entered a $100M+ multi-year partnership to launch Intuit app experiences in ChatGPT and expand Intuit’s use of OpenAI’s frontier models to power personalized financial tools.
WeatherNext 2: Our most advanced weather forecasting model
The new AI model delivers more efficient, more accurate and higher-resolution global weather predictions.
OpenAI named Emerging Leader in Generative AI
OpenAI has been named an Emerging Leader in Gartner’s 2025 Innovation Guide for Generative AI Model Providers. The recognition reflects our enterprise momentum, with over 1 million companies building with ChatGPT.
Easily Build and Share ROCm Kernels with Hugging Face
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Introducing OpenAI for Ireland
OpenAI launches OpenAI for Ireland, partnering with the Irish Government, Dogpatch Labs and Patch to help SMEs, founders and young builders use AI to innovate, boost productivity and build the next generation of Irish tech startups.
Join the AMD Open Robotics Hackathon
Open the source for the full engineering note.
SIMA 2: An Agent that Plays, Reasons, and Learns With You in Virtual 3D Worlds
Introducing SIMA 2, a Gemini-powered AI agent that can think, understand, and take actions in interactive environments.
Understanding neural networks through sparse circuits
OpenAI is exploring mechanistic interpretability to understand how neural networks reason. Our new sparse model approach could make AI systems more transparent and support safer, more reliable behavior.
Introducing GPT-5.1 for developers
GPT-5.1 is now available in the API, bringing faster adaptive reasoning, extended prompt caching, improved coding performance, and new apply_patch and shell tools.
How Philips is scaling AI literacy across 70,000 employees
Philips is scaling AI literacy with ChatGPT Enterprise, training 70,000 employees to use AI responsibly and improve healthcare outcomes worldwide.
Introducing group chats in ChatGPT
Collaborate with others, and ChatGPT, in the same conversation.
Building for an Open Future - our new partnership with Google Cloud
Open the source for the full engineering note.
Neuro drives national retail wins with ChatGPT Business
Neuro uses ChatGPT Business to scale nationwide with fewer than 70 employees, saving time, reducing costs, and turning faster execution across sales and operations into growth.
Fighting the New York Times’ invasion of user privacy
OpenAI is fighting the New York Times’ demand for 20 million private ChatGPT conversations and accelerating new security and privacy protections to protect your data.
GPT-5.1 Instant and GPT-5.1 Thinking System Card Addendum
This GPT-5 system card addendum provides updated safety metrics for GPT-5.1 Instant and Thinking, including new evaluations for mental health and emotional reliance.
GPT-5.1: A smarter, more conversational ChatGPT
We’re upgrading the GPT-5 series with warmer, more capable models and new ways to customize ChatGPT’s tone and style. GPT-5.1 starts rolling out today to paid users.
Teaching AI to see the world more like we do
Our new paper analyzes the important ways AI systems organize the visual world differently from humans.