Codex Articles

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12/19/2025 • EN

Introducing GPT-5.2-Codex

OpenAI releases GPT-5.2-Codex, a model optimized for agentic coding with improvements in refactoring, Windows performance, and cybersecurity.

ai coding Codex cybersecurity Gpt 52 Codex Openai

Simon Willison

11/6/2025 • EN

Code research projects with async coding agents like Claude Code and Codex

Exploring how asynchronous coding agents like Claude Code and Codex can automate code research projects by running experiments and submitting pull requests.

Asynchronous Coding Claude Code Code Research Codex LLM Agents

Simon Willison

Codex Articles

Introducing GPT-5.2-Codex

Code research projects with async coding agents like Claude Code and Codex

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