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01 · AI News Anthropic and PwC expand alliance to deploy Claude at scale

Anthropic and PwC say they are expanding their alliance, including rolling out Claude Code and Cowork, creating a joint center of excellence, and training 30,000 PwC staff.

02 · AI Research ArXiv paper: compare reasoning models by correcting for length

A new arXiv paper studies hidden-state trajectories during chain-of-thought and argues you must correct for response length before comparing “reasoning” behavior across tasks.

03 · AI Tools OpenAI previews Codex in the ChatGPT mobile app

OpenAI says Codex is now available in preview in the ChatGPT mobile app, letting you check in on long-running work and approve or redirect it from your phone.