---
title: Text watermark
url: https://platform.claude.com/docs/en/build-with-claude/text-watermark
description: What Anthropic's text watermark leaves unchanged, where to find the models and platforms it covers, and which sampling parameters to omit if you rely on it.
---

Text generated by supported Claude models carries Anthropic’s text watermark. [How Claude marks AI-generated content](https://support.claude.com/en/articles/16266773-how-claude-marks-ai-generated-content) lists the models and platforms it covers, and [How Claude’s text watermark works](https://www.anthropic.com/news/claude-text-watermark) gives the background.

The watermark doesn’t change the meaning, quality, or readability of the output. It adds no tokens or hidden characters and carries no information about you or your organization. You don’t need to change your requests or response handling for it. If you rely on the watermark and set `temperature`, `top_p`, or `top_k`, see [Sampling settings](https://platform.claude.com/docs/en/build-with-claude/text-watermark#sampling-settings).

## Sampling settings

On Claude Sonnet 4.6, text generated for a request that sets `temperature`, `top_p`, or `top_k` to a non-default value might not carry the watermark. If you rely on the watermark, omit all three parameters from your requests, including any that a framework or client library sets for you.