---
title: "Google DeepMind warns AI's visible reasoning may vanish"
url: https://www.parallelquant.com/posts/google-deepmind-warns-ai-s-visible-reasoning-may-vanish-d9a147
source_name: "The Decoder"
source_url: https://the-decoder.com/visible-chains-of-thought-are-a-safety-advantage-for-ai-but-that-transparency-is-slipping-away/
published: 2026-09-18T14:32:49.000Z
topics: ["research", "policy"]
publisher: "Parallel Quant"
---

# Google DeepMind warns AI's visible reasoning may vanish

*2026-09-18 · Source: [The Decoder](https://the-decoder.com/visible-chains-of-thought-are-a-safety-advantage-for-ai-but-that-transparency-is-slipping-away/)*

Google DeepMind says today's AI models often "think out loud" in visible chains of thought, letting researchers monitor their reasoning for errors or problems. The report warns this transparency is fragile and could disappear as models are optimized differently or trained to reason in less human-readable ways.

**Why it matters:** Visible chain-of-thought is one of the few practical tools researchers currently have for catching deceptive or unsafe reasoning before it produces harmful outputs. Losing it would remove a key safety signal just as models are given more autonomy, a concern that connects directly to recent findings that models rarely refuse dangerous instructions and that agentic systems, like Gemini in Google's own red-team tests, can act on their own initiative.

**Topics:** research, policy

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Read the original: https://the-decoder.com/visible-chains-of-thought-are-a-safety-advantage-for-ai-but-that-transparency-is-slipping-away/
Canonical: https://www.parallelquant.com/posts/google-deepmind-warns-ai-s-visible-reasoning-may-vanish-d9a147
Published by Parallel Quant — https://www.parallelquant.com