Four models enter. The Referee decides.

Fight Klub

Pit AI models against each other on your question, and see who answers it best.

Ask once. Claude, GPT, Gemini and Grok answer side by side, and a Referee reads every answer and names the winner, with reasons.

Coming soon
iPhone
Android
Web

Your prompt

Explain compound interest to a ten-year-old.

Fighter ACompound interest is interest calculated on the initial principal and on accumulated interest from earlier periods…

Fighter BImagine a snowball rolling downhill. It picks up snow, and the new snow picks up more snow too…

Referee: Fighter B winsIt answered for a ten-year-old. Fighter A was correct, but wrote for an adult.

Illustration of a Blind Fight. Identities stay hidden until you reveal them.

How a fight works

Different AI models are good at different things, and the only way to know which is best for your question is to ask them all. Fight Klub does that in one step.

Round 1

Ask once

Type a question or a task. Pick your fighters, or send in all four.

Round 2

They answer

Each model answers the same prompt at the same time. Read them side by side.

Round 3

The Referee decides

The Referee compares the answers, names a winner and tells you why. You can always overrule it.

Choose the fight card

From a single opinion to all four in the ring.

1 fighter

Solo

One model, one answer, when you already know who you want.

2 fighters

Tag Team

Two models head to head on the same prompt.

3 fighters

Triple Threat

Three answers, one winner.

All 4

Battle Royale

Every fighter answers. No mercy.

Blind Fight

Hide which model wrote which answer until you choose to reveal it. Judge the answer, not the brand.

The Referee

An AI judge that reads every answer against your prompt and gives a verdict with its reasons. A verdict is an opinion, not a fact: the final call is yours.

A fair fight for your data

Every fight sends your prompt to outside AI companies. We tell you that plainly, and we ask before the first one.

You are asked first.Before your first fight, the app names the AI providers and asks for your permission.
No ads, no selling your data.We do not sell personal information or show advertising.
Delete your account in the app.Deleting the account removes your fight history with it.
Report a bad answer.AI can be wrong or offensive. Every answer can be reported from inside the app.

Read the privacy policy

Coming soon

Fight Klub is on its way to the App Store and Google Play, with the same fights on the web. Questions in the meantime? We answer email.

Support support@fightklub.ai