OpenAI's Codex, powered by GPT-5.5, has surpassed Anthropic's Claude Code in functionality, becoming a preferred tool for knowledge work. Users like Dan Shipper and Austin Tedesco are now daily drivers of Codex for tasks such as drafting strategy documents and recruiting. The transition from Claude Code to Codex is described as straightforward, with the AI assisting in adapting existing project structures and workflows. AI
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IMPACT Highlights the rapid iteration and competitive landscape in AI coding assistants, influencing daily workflows for knowledge workers.
RANK_REASON This article discusses a product's improved functionality and user adoption, not a new model release from a frontier lab.