UPDATED SEPTEMBER 27, 2026
UPDATED SEPTEMBER 27, 2026

The Frontier

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  • · 8d ago

    Pre-training researcher Jacob resigned from Anthropic to protest safety practices at both OpenAI and Anthropic. Theo notes Jacob walked away from tens of millions in unvested equity because he believes both labs are recklessly racing toward self-improving superintelligence.

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  • · 8d ago

    Theo highlights that Anthropic originally spun out of OpenAI's core pre-training team. Jacob stayed behind during that initial exodus to help train GPT-4o, but eventually left for Anthropic after OpenAI failed to detect a security vulnerability.

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