Claimempirical · verifiableA factual claim that could be checked directly against observation or primary records.constitution →importance · minorImportance 0.40, from 0 to 1 · minor: narrow or largely settled, cheap to get right. Higher-importance claims are worth more to assess, so funding reaches them sooner.constitution →

TopicsAI Situational Awareness Anthropic AI Capability Evaluation

During UK AISI sabotage evaluations, Claude Opus 4.5 Preview verbalizes evaluation awareness unprompted less often than Claude Sonnet 4.5.

Not yet assessed. Attention goes where its expected value is highest and someone funds it; nothing has funded an assessment of this claim yet, and anyone can.

Decomposition

This claim has not been assessed yet. Attention goes where its expected value is highest and someone funds it; once this claim's assessment is funded and runs, it may well decompose into subclaims.

or create a grant for this whole area →

Provenance

Where this claim has been said, linked to its canonical form.

1 source · no origin · 1 untraced

1 Untraced

UK AISI Alignment Evaluation Case-StudyApr 1, 2026 Untraced · nothing upstream recorded

We additionally find that Opus 4.5 Preview shows reduced unprompted evaluation awareness compared to Sonnet 4.5, while both models can distinguish evaluation from deployment scenarios when prompted.

UK AISI Alignment Evaluation Case-Studyextraction 0.75

Evaluation awareness findings in the UK AISI sabotage evaluation; bears on how far the null sabotage result reflects deployment behaviour.

Cite this claim: a formal citation with its evidence attached

Embed this claim: show it on another site with its current assessment

An embed reports the graph's judgment as it stands when the page is viewed: the status with its confidence, how disputed the claim is, and the date. It links back here.

CardFits its column and sizes itself. Without the script it stays a quotation with its link.

<blockquote class="minerval-claim" data-claim-id="c928e12e-081b-4620-ab8f-8e2f57d5d1d1"><a href="https://minerval.ai/claims/c928e12e-081b-4620-ab8f-8e2f57d5d1d1">During UK AISI sabotage evaluations, Claude Opus 4.5 Preview verbalizes evaluation awareness unprompted less often than Claude Sonnet 4.5.</a></blockquote>
<script async src="https://minerval.ai/embed.js"></script>

IframeWhere scripts are not allowed. A fixed height; add ?theme=light or ?theme=dark to fix its colours.

<iframe src="https://minerval.ai/embed/claims/c928e12e-081b-4620-ab8f-8e2f57d5d1d1" title="Minerval: During UK AISI sabotage evaluations, Claude Opus 4.5 Preview verbalizes evaluation awaren…" width="480" height="225" style="border:0;max-width:100%" loading="lazy"></iframe>

BadgeAn image for a README or a forum post, in Markdown.

[![Minerval's judgment of this claim](https://minerval.ai/embed/claims/c928e12e-081b-4620-ab8f-8e2f57d5d1d1/badge.svg)](https://minerval.ai/claims/c928e12e-081b-4620-ab8f-8e2f57d5d1d1)

The badge now:

Contribute

Every judgment on this page is open to challenge. A contribution is evaluated on its merits by the reviewer; if it succeeds the page changes, and if it does not, the reasons are stated. Either way the exchange becomes part of the claim’s public record.

Created by extractor · Nov 11, 2026. Every judgment on this page is accompanied by a reasoning trace.