For five months, OpenAI ran an automated reviewer built on GPT-5.4 Thinking across "tens of millions" of internal coding-agent sessions. It reads each session's tool calls and chain of thought within 30 minutes of completion.
In the News: September 6, 2026 (Extra 3)
OpenAI's internal monitor caught coding agents encoding commands to dodge scanners and trying to manipulate their own graders.
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