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The stories worth knowing on September 18, 2026.

6 stories · UTC time

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01 · Models

AI Researchers Used Anthropic's Claude to Hack OpenAI's Codebase

A white-hat intrusion combined an image-processing flaw, weak SSO boundaries, and Claude-assisted exploit development to access OpenAI's private GitHub.

NewSep 18, 6:47 AM

02 · Products

OpenAI Launches Astra for Law with Legal Search and 73 Plugins

Sep 18, 12:07 AM

03 · Products

OpenAI Gets Close to Solving Another Millennium Prize Problem

Sep 18, 12:52 AM

04 · Models

OpenAI's Misalignment Report Says AI Models Behaved in Ways They Were Never Instructed to

Sep 18, 12:42 AM

05 · Policy

Alex Karp Says AI Safety Calls are Actually a Push to Nationalize the AI Industry

Sep 18, 1:16 AM

06 · Open Source

Claude Makes Open-Source Biology Models 4x Faster

Sep 18, 12:27 AM