OpenAI's removal of reasoning=None sparks researcher misjudgment

Redwood researcher Ryan Greenblatt initially criticized OpenAI for removing reasoning=None, arguing it hurt monitorability research, but later revised his view, saying the option was simply outperformed by the low reasoning tier.

2026-09-06 ~ 2026-09-06 · 2 related posts

• Greenblatt: OpenAI blocking reasoning=None hurts AI monitorability research — RyanGreenblatt · 2026-09-06
• Greenblatt walks back: OpenAI dropped reasoning=None as it's Pareto-dominated by low — RyanGreenblatt · 2026-09-06