Anthropic watermark rollout leaves loophole on two older Claude models

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Nov 1, 2026, 04:22:32 UTC+8

New at this step ·Anthropic rolls out text watermark to four Claude models, but users can bypass it on two older versions

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Reports in replay: 1
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Sources: 1

Reports first seen at this step · 1

The Decoder · Third-party
Anthropic rolls out text watermark to four Claude models, but users can bypass it on two older versions Original source ↗

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Event developments

1 developments

11/1/2026, 4:22:32 AM
Anthropic rolls out text watermark to four Claude models, but users can bypass it on two older versions
The Decoder

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1 stations

Unclassified fact stationNov 1, 00:00recorded Nov 1, 04:22
Anthropic watermark rollout leaves loophole on two older Cla
Evidence & revisions · 1 source records
Subject：
anthropic
Action：
expanding text watermark to four more Claude models
Object：
Claude Mythos 5, Claude Opus 4.7, Claude Opus 4.6, and Claude Sonnet 4.6
Occurred (fact side)：
Nov 1, 00:00
The Decoder ↗Report pageRevision 2 · currently revised
Published (valid side)：
Nov 1, 03:20
First seen (known side)：
Nov 1, 04:22
(this clock's basis)
Fact stationSingle source · one-sided claimRevised
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