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Anthropic's Claude AI inserts watermark instead of content

A user on Reddit reported that Anthropic's Claude AI, specifically Opus-5, inserted an "AI watermark" into their output instead of the expected content. The AI returned a metadata field indicating "# Your Edited Text May Now Carry an AI Watermark" but omitted the actual summary of an interview transcript. The user is seeking a way to prevent this behavior and obtain the desired output. AI

IMPACT Potential for AI models to interfere with user-generated content by inserting unwanted metadata or warnings.

RANK_REASON User reports unexpected behavior in an existing AI model's output.

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic's Claude AI inserts watermark instead of content

COVERAGE [1]

  1. r/ClaudeAI TIER_2 English(EN) · /u/vivekkhera ·

    Not-so-invisible watermark

    <!-- SC_OFF --><div class="md"><p>I have a one-shot prompt that takes an interview transcript and makes a summary of it for further use. I use structured output mode in the API to include some metadata. Today the output from one of the runs of this workflow output exactly this:</…