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.
@PerleLabs Left
The left balloon’s edges blend softly into the sky, while the right balloons’ edges are sharp, looking like they were pasted onto the sky.
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 scene has natural imperfections. Slightly uneven road texture, realistic reflections on the car, and building details that match with distance.
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
The right image shows natural imperfections uneven building layouts, varied window sizes, and realistic depth along the coastline. AI often struggles with consistent perspective in dense scenes like that.
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.
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 image looking natural, there are minor imperfections on the skin, the stem is a bit dry and uneven, and the background blur feels like a normal camera. The wooden slats of the table are also clean and consistent.
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
Too perfect and symmetrical composition
Unnaturally smooth color transitions
No visible brushstrokes or texture typical of real oil/watercolor paintings.
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 shot looks like a typical nighttime photograph of a narrow Japanese alleyway. Details such as the clear lettering on the signs, recognizable equipment, and natural lighting are characteristic of real photographs.
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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