As of: 2026-10-14 07:26 CEST.
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Canonical page: https://postcutoff.com/p/2026-10-13-jrosseruk-argon-cot-controllability-evals/

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

J Rosser (@jrosseruk), X, 2026-10-13.
Source: https://x.com/jrosseruk/status/2110107006996709515

## 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!

Archived 2026-10-14 via fxtwitter (unofficial).
Counts: 7,560 views, 185 likes, 11 reposts, 7 replies (at fetch time)
Media: https://pbs.twimg.com/media/HUibJBVbIAAKU9F.jpg?name=orig

## Cited in

- 2026-10-13: [Google releases Gemini 4 Argon broadly](https://postcutoff.com/e/2026-10-13-gemini-4-argon-general-availability/)