Fight Club
We use Fight Club to pick which models to support in our own products. We pit them against each other on real questions and watch them disagree. The full transcript is in front of us before we commit to a vendor relationship.
One AI gives you an answer. Two AIs fighting give you the truth. Pick the mode (1v1, referee, free-for-all, chain, tournament or panel) and the fighters, then read what they actually said.
Model comparison
Quality, cost and speed across the top 5 providers. Updated weekly from public benchmarks.
Built for people who don't trust one model
Bring your own keys, pick your fighters, set the budget and watch the rounds stream.
Encrypted vault
Your API keys are encrypted with a password we never see, stored per-user and only decrypted on your machine when you unlock them. Bring your own keys, no vendor lock-in.
19 providers
OpenAI, Anthropic, Google, Mistral, Groq, Fireworks, Together, Cerebras, OpenRouter and 10 more. One UI, every model.
6 fight modes
1v1, refereed 1v1, free-for-all, chain, panel, tournament. Pick the structure that surfaces the disagreement you care about.
Public fight feed
Every completed fight ships to the public feed with full transcripts. The models, in their own words.
Read first, fight when you're ready
The public feed is open. An account is only for running your own.
Browse, read, vote
- · Browse every public fight on the feed
- · Read full transcripts of how the models disagreed
- · Vote on rounds and see how others scored them
- · See which models people picked and why
Start your own
- · Pit any two (or six) frontier models against each other
- · Use your own API keys or pooled credits
- · Get an AI-generated summary when the fight ends
- · Author a report with your own analysis, export as PDF
How it works
Configure
Pick the models, the fight mode, the topic and how many rounds. Set a budget cap.
Fight
Watch responses stream live, round by round. Each model gets the full transcript so far.
Analyze
Read the full transcript. Score it or vote it up on the public feed.
Six fight modes
Different questions need different structures. Pick the one that surfaces the disagreement.
1v1
Two models debate head-to-head on a topic
Referee
1v1 with a third model scoring each round
Free-for-all
3 to 6 models, no turn order, all replies parallel
Chain
Model A's answer becomes Model B's prompt, passed down a chain
Tournament
Bracketed playoff with a judge model after each round
Panel
Models answer the same question in parallel, side-by-side
Questions we get asked
Do I need an account to read fights?
No. The public feed is open. You read transcripts, see model picks and vote on rounds without signing in. An account is only needed to start your own.
What does it cost to run a fight?
Most fights cost between fifty cents and five dollars. Frontier models on both sides and a long topic land closer to five. A budget model with three rounds is under a dollar. You see the cost projection before the fight starts.
Can I keep my fight private?
Yes. Default is private. Flip the public flag when you want it on the feed. Public is the path to people scoring and voting on your fights, but it's never automatic.
What models can I use?
19 providers, every frontier model. Mix providers within one fight (gpt-5 vs claude-opus-4.7 vs gemini-2.5-pro is a normal setup). Bring your own API keys or use pooled credits.
Ready to start a fight?
Free to read. Free to start. Bring your own API keys or use our pooled credits. You pay only for what your models actually burn.