Detection is moving from guesswork to a built-in check

As AI writing gets harder to spot by reading alone, providers are building verification into the output itself.

Reading for tone and style is a losing game as models keep improving, so the more durable signal has to live in the file, not the reader's judgment.

Google's SynthID watermarks AI-generated images and audio. Claude embeds an invisible statistical pattern into text that a detector can check without changing how it reads.