Anthropic’s Content Checker Tool Is Here, With One Big Catch
You can look for Claude’s watermarks in a lot of files, but not in text just yet.
Anthropic has launched a content checker tool that can confirm if files were generated using its Claude AI technology. The service is available at claude.com/check-content, allowing users to upload multimedia files like JPEGs, GIFs, MP3s, and MOVs for scanning. Anthropic noted that the checker is designed to detect watermarks embedded in text and is currently in a private preview for AI detection tools.
Text checking is handled by a separate Detection API in a private preview, with further details expected in the coming months. The company stated that Claude-generated text watermarks will not impact text quality, speed, or cost, and these watermarks remain with the text even when copied or pasted. Businesses and organizations interested in accessing the watermark detector can sign up for access via a form on Anthropic's site.
The tool maintains user privacy, as files are not stored or used for any purpose other than reading the credentials. During testing, the detector accurately identified a file converted from a PowerPoint presentation using Claude. If the C2PA industry standard expands to other file formats, Anthropic may incorporate this feature into its checker tool.
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