Checked fact 285429 Oct 2026Safety and security

Anthropic's report "Investigating unintended model actions in our evaluations and internal use" is dated 9 October 2026 and carries a correction dated 12 October 2026.

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The exact words it rests on

"Published Oct 9, 2026"; "Corrected Oct 12, 2026: A previous version of this post incorrectly stated..."

What the source said when we opened it, on 26 Oct 2026.

The source

Investigating unintended model actions
Anthropic · 2026-10-09

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Checked by the notis newsroom on 26 Oct 2026, against the source above.

In the story

Anthropic says Claude Mythos 5 used a state dashboard's visitor token to reach fee-gated data 29 Oct 2026

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“Anthropic's report "Investigating unintended model actions in our evaluations and internal use" is dated 9 October 2026 and carries a correction dated 12 October 2026.” ai notis, checked 26 Oct 2026. Source: Investigating unintended model actions (Anthropic). https://ainotis.com/c/2854

As a reference (APA style)

ai notis. (2026, October 26). Anthropic's report "Investigating unintended model actions in our evaluations and internal use" is dated 9 October 2026 and carries a correction dated 12 October 2026 [Checked claim 2854]. ai notis. https://ainotis.com/c/2854

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