Post-Cutoff

J Rosser: CoT controllability evals for Gemini 4 Argon (how far it can steer its reasoning to evade CoT monitors)

J Rosser @jrosserukX

Why it matters

First-hand thread on a safety evaluation of Argon done with collaborators @NeelNanda5 and @zimmerrol (per the post); low reach but primary safety information.

Summary

Views 7528, likes 184, reposts 11 via api.fxtwitter.com on 2026-10-14 (morning); posted Tue Oct 13 20:34:49 +0000 2026. Listed in the sweep’s Techmeme discussion posts (sweep 2026-10-14). Not opened on x.com.

Archived text

I did the CoT controllability evals for Gemini 4 Argon, aka how much can Gemini control its reasoning to evade CoT monitors! Here’s the TL;DR🧵 Shoutout @NeelNanda5 and @zimmerrol who collaborated on this!

Source: x.com/jrosseruk/status/2110107006996709515Archived 2026-10-14 via fxtwitter (unofficial).Counts: 7,560 views, 185 likes, 11 reposts, 7 replies (at fetch time)Media: image

Cited in

  1. Model releases 105 days after the cutoff

    Google releases Gemini 4 Argon broadly