🤖AI Models Show Unique Writing Tells, Claude Closes Gap
AI models have distinct writing styles, but Claude's getting closer to human
TL;DR
Researchers found 13,000 phrases more common in AI content. Claude's writing is becoming more human-like, while GPT models diverge. Key tells include 'dependable' in Claude and 'corrective framing' in Astra.
Researchers identified 13,000 phrases that are at least twice as common in AI-generated content compared to human writing. Claude models, specifically Opus 5.5, are getting closer to human word distribution, with phrases like 'dependable' appearing 23 times more often in AI content. Meanwhile, GPT models are moving further away from human-like writing, using phrases like 'this matters' 116 times more frequently. Frontier labs are responding by reducing the use of em-dashes, but the overall number of unique 'tells' remains steady, indicating that models still have distinct writing styles. This matters for anyone evaluating AI-generated content for authenticity or bias.
Key Points
Researchers used a corpus of 10,000 articles published before ChatGPT as a human-generated control group.
Claude Opus 5.5 uses the word 'dependable' 23 times more often than in human samples.
Astra tends to describe things as 'another dimension', a phrase more than 100 times more common in AI-generated prose.
Gemini 3.1 Pro has almost completely eliminated the em-dash from its writing, reducing it by 99%.
Every model version has its own unique tells, despite labs focusing on human-like writing styles.
Why It Matters
If you're evaluating AI-generated content for authenticity or bias, the unique writing styles of models like Claude and Astra can be telltale signs. For instance, Claude's use of 'dependable' and Astra's 'corrective framing' can help identify AI-generated text. This is crucial for anyone working with AI content in fields like journalism, legal documents, or academic research.
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