SBTI and MBTI get compared constantly, but they're not even the same species. One wears a lab coat and tries to profile your psyche. The other wears a Hawaiian shirt and waits for you to screenshot the result.
That said, even though SBTI has been upfront about being a joke since day one, its design is more thoughtful than most "serious" viral quizzes. Let's break it down.
Different origins, different goals
MBTI stands for Myers-Briggs Type Indicator. It was developed in the 1940s by Katharine Briggs and her daughter Isabel Myers, based on Carl Jung's theory of psychological types. The psychology community is split on its validity, but that hasn't stopped it from showing up in every corporate training and social media bio.
SBTI stands for Silly Behavioral Type Indicator. It was created by a Bilibili creator called 蛆肉儿串儿. Launched on April 9, 2026, it hit trending on every major Chinese platform within two days. It's not trying to replace MBTI or be a psychology tool. It's the thing you take so you can post the result.
Completely different dimension models
MBTI uses 4 binary dimensions (Extraversion/Introversion, Sensing/Intuition, Thinking/Feeling, Judging/Perceiving) to sort people into 16 types. SBTI uses 5 facets with 3 sub-dimensions each, so 15 dimensions in total, each scored on three levels (Low/Mid/High) and mapped to 27 types. Here's how they line up:
| MBTI | SBTI | |
|---|---|---|
| Dimensions | 4 | 5 × 3 = 15 |
| Types | 16 | 27 |
| Questions | 93 | 31 |
| Time | 20-30 min | 1-3 min |
| Tone | Serious, academic | Self-deprecating, meme-driven |
| Purpose | Career development, self-understanding | Entertainment, social sharing |
Type names: formal vs absurd
MBTI gives you a four-letter code like INFP or ESTJ with semi-formal labels like "Mediator" or "Executive." You could put it on a resume.
SBTI gives you things like DEAD (The Deadpan), MALO (The Monkey), FUCK (The Swearer), ATM-er (The Walking ATM). You probably wouldn't put these on a resume, but you'd absolutely post them on social media. That's the whole point: the result itself is the punchline.
Why SBTI went viral
31 questions, no registration, open and play, result in 1 to 3 minutes. The barrier is basically zero. MBTI asks 93 questions, and a lot of people close the tab halfway through.
After you finish, you don't get a personality description that takes three paragraphs to parse. You get a label like "Monkey" or "Deadpan" with a meme-style illustration. Screenshot, share, and your friends want to take it too. Once that loop starts, it's hard to stop.
The key ingredient: SBTI's self-deprecating humor hits exactly where young people are right now. In a world where everyone talks about burnout and "lying flat," a test that tells you "you're a monkey" actually makes people feel seen. You laugh, and then there's a split second of "damn, that's kind of true."
Which one should you take?
This question is a bit odd because the two tests are playing completely different games. You wouldn't ask "should I eat a meal or a snack" — they serve different needs.
Want to seriously explore your personality tendencies or plan your career? Take MBTI (or better yet, the Big Five). Want to drop something funny in the group chat? Take SBTI. They don't conflict.