With AI writing assistants on the rise, it’s getting harder to tell human and machine writing apart. But there are still clear signs—and tools—that help.

Spotting AI Writing Manually

• Text is generic and surface-level
  
  

• Sentences are complex but add little meaning
  
  

• Same words repeated throughout (“embark”, “unlock”, “testament”)
  
  

• Tone is stiff or too formal
  
  

• Content lacks credible references
  
  

• Inconsistent facts or formatting
  
  

• No personal insights or lived experiences
  
  

AI Detection Tools You Can Trust

• Originality.ai – Paid but highly accurate
  
  

• Undetectable AI – Free, plus rewrites text to bypass detectors
  
  

• GPTZero – Measures perplexity and burstiness
  
  

• ZeroGPT – Free tool with sentence-level highlights
  
  

Conclusion
Knowing how to tell if something was written by ChatGPT requires a mix of skills and tech. Use your own analysis plus AI detectors for the best chance of catching bot-written content.

View details here: How to Tell if Something Was Written by ChatGPT? (2025 guide)