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John Hallman
Researcher

John Hallman

Pretraining Researcher at OpenAI

LinkedIn@johnohallmanWebsite

Pre-training and post-training researcher at OpenAI, retired math olympian and figure skater.

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Rohan PandeyFounder
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OpenAI Staff Grapples with the Company's Social Media Push
TechCrunchnewscautiousOct 2, 2025

OpenAI researchers express mixed concerns about the Sora social media app launch, citing tension between the company's consumer business ambitions and its nonprofit mission to develop AI for humanity's benefit.

“Expressed concern about AI-based feeds when OpenAI released the Sora 2 social media app but supported the team's approach.”

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Taking the Bitter Lesson Seriously
rohanpandey.substack.comopinionpositiveOct 1, 2025

Taking The Bitter Lesson seriously means enabling AI to accelerate compute and energy technologies through autonomous science and RL-guided experimentation, rather than pursuing recursive self-improvement through algorithms alone.

“Acknowledged for reviewing drafts of the essay”

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