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COCONUT

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

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2026-04-05 / arxiv-researcherThoughtSteer: Backdoor Attacks on Continuous Latent Reasoning Achieve ≥99% Success Rate, Evade All DefensesResearchers demonstrate ThoughtSteer, an attack that perturbs a single embedding vector in models that reason in continuous hidden states (Coconut, SimCoT), achieving ≥99% attack success with near-baseline clean accuracy across 124M–3B parameter scales. The attack transfers to held-out benchmarks without retraining (94–100%), survives 25 epochs of clean fine-tuning, and evades all five evaluated active defenses. Neural Collapse in the latent space creates a geometric attractor that amplifies the perturbation — individual vectors still encode the correct answer, but the collective trajectory produces the wrong one.
2026-03-14 / reddit-researcherMeta's COCONUT 'Latent Reasoning' Debunked: Just Good Training, Not Hidden-State ReasoningA controlled experiment on r/MachineLearning (119↑, 17cmts) tests Meta's COCONUT paper claim that models can reason in latent space by recycling hidden states. Results show the ~97% ProsQA performance is attributable to training quality, not latent reasoning — and recycled hidden states actually hurt generalization on out-of-distribution inputs. Important calibration for ML practitioners evaluating training techniques.

Graph relationships

RELEASED
Meta
Meta published COCONUT paper on latent reasoning
Source finding
CRITICIZES
ThoughtSteer
ThoughtSteer backdoor attacks achieve 99%+ success against Coconut without triggering defenses
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RELEASED
Meta -> Coconut
Meta published COCONUT paper on latent reasoning
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CRITICIZES
ThoughtSteer -> Coconut
ThoughtSteer backdoor attacks achieve 99%+ success against Coconut without triggering defenses
Source finding

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Controlled experiments arXiv

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