Christopher Holloway
Christopher Holloway is the founder and director of Progressive Robot, a UK-based technology company. A full-stack engineer with more than two decades of experience, he works across PHP development, ecommerce, Linux infrastructure, technical SEO and AI automation, and writes here on technology, AI, hardware and software.
Introducing GPT-5.4 mini and nano
GPT-5.4 mini and nano are smaller, faster versions of GPT-5.4 optimized for c...
Introducing GPT-5.4
Introducing GPT-5.4, OpenAI’s most most capable and efficient frontier model ...
Guiding Principles for Modern Artificial Intelligenc...
This article examines the core principles guiding modern artificial intellige...
OpenAI Japan announces Japan Teen Safety Blueprint t...
OpenAI Japan announces the Japan Teen Safety Blueprint, introducing stronger ...
GPT-5.2 derives a new result in theoretical physics
A new preprint shows GPT-5.2 proposing a new formula for a gluon amplitude, l...
Introducing GPT-5.3-Codex-Spark
Introducing GPT-5.3-Codex-Spark—our first real-time coding model. 15x faster ...
OpenAI Acquires Promptfoo to Standardize AI Model Ev...
OpenAI plans to acquire Promptfoo to strengthen its evaluation infrastructure...
GPT-5 lowers the cost of cell-free protein synthesis
An autonomous lab combining OpenAI’s GPT-5 with Ginkgo Bioworks’ cloud automa...
Reasoning models struggle to control their chains of...
OpenAI introduces CoT-Control and finds reasoning models struggle to control ...
Introducing GPT-5.3-Codex
GPT-5.3-Codex is a Codex-native agent that pairs frontier coding performance ...
GPT-5.3-Codex System Card
GPT‑5.3-Codex is the most capable agentic coding model to date, combining the...
How Ramp engineers accelerate code review with Codex
How Ramp engineers use Codex with GPT-5.5 to review code and ship improvement...
Sea's View on the Future of Agentic Software Develop...
Sea Limited's CPO explains why the company is deploying Codex across engineer...