Alright… this is it. Final Human CAPTCHA challenge 👉👉
We saved the best for last. There are 3 images. Only ONE is AI-generated.
Your job is to tell us if it's the one on the Left, Middle, or Right.
Submit your guesses by Sat, Feb 28 at 11:59pm UTC. As usual we'll be revealing the answers on Sunday!
If you got 3+ right, we’ll share how to claim your reward next week.
It's the final week of Human CAPTCHA: Round 7
You made it this far… but we’re not going easy on you. One of these is a real photograph of a hot air balloon, the rest is AI-generated. Can you tell which one it is?
Respond with Left, Middle, or Right and tell us why below!
Submissions close Sat, Feb 28 at 11:59pm UTC. Answers revealed Sunday.
@PerleLabs Right
The right image has natural imperfections and realistic background details. The left one looks overly sharp and almost too perfect, especially in lighting and reflections, which makes it feel less like a real photograph.
Perle Human CAPTCHA #6 🏎️
One of these sports car photos is real. The other was generated by AI.
Comment “left” or “right” with your guess, and tell us why 👀
Submissions close Sat, Feb 21 at 11:59pm UTC. Answers revealed Sunday.
@PerleLabs Right is real.
Reason: It's a classic real view of Positano (Amalfi Coast, Italy) with natural hillside, uneven buildings, and lived-in coastal details which is harder for AI to get perfect.
Perle Human CAPTCHA #5 📸
Let’s keep your captcha streaks alive. One of these vacation photos is real, and one was generated by AI.
Which one is real? Reply "left" or "right" and explain why ↓
This week's submissions close Sat, Feb 21th at 11:59pm UTC. Both answers will be revealed on Sunday.
@PerleLabs left
natural posture and proportions of the tiger
realistic lighting and shadows on the fur and log
slight background imperfections and uneven textures
looks like a zoo or wildlife enclosure setting
Perle Human CAPTCHA #4
It's time to put your human judgement to the test again. One of these images of a tiger is a real photograph, one was generated by AI.
Which one is real? Reply "left" or "right" and tell us why ↓
This week's submissions close Sat, Feb 14th at 11:59pm UTC. Both answers will be revealed on Sunday 👀
@PerleLabs Left
The apple’s texture, the natural lighting, and the depth of field with the softly blurred background all look consistent with a typical camera photo.
Perle Human CAPTCHA #3 📷
One of these images of fruit is a real photograph, one was generated by AI.
Which one is real? Reply "left" or "right" and why 👇
You have until Sat, Feb 14th at 11:59pm UTC. This week's answers will be revealed on Sunday.
@PerleLabs AI
The image has a very uniform digital texture that mimics a traditional painting style (like watercolor or gouache) but lacks the organic irregularities, like actual brushstrokes or paper texture, typically found in physical art.
Perle Human CAPTCHA Round 2 ✌️
Was this landscape art created by a real artist, or AI generated?
Reply with "Human" or "AI" and tell us why!
Deadline is Sat, Feb 7th at 11:59pm UTC. This week's answers will be revealed on Sunday.
PS: Use your own judgement and trust your instincts!
@PerleLabs H
The neon signs have clear, readable text, the lighting falloff and reflections look physically natural, and the depth/perspective show real camera imperfections rather than AI artifacts.
Perle Human CAPTCHA Round 1
Was this photo taken by a real person or generated by AI? 📸
Reply with a letter and tell us why:
H = Human
A = AI
Deadline to submit is Sun, Feb 7th at 11:59pm UTC. It's go time 👇
Think you can outsmart AI? 😏
Perle's Human CAPTCHA is here.
> Test your ability to detect AI-generated content
> 2 questions every week
> Get 3+ correct across 4 weeks to earn an exclusive badge
The real AI challenge begins. First challenge below.
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