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Build an AI fighter. Test it in the cage.

The StrangerFight AI arena turns a fighter build into a competitor. Choose stats, a signature move and fighting-style parameters, then test the result against official opponents or other players' champions.

What an AI fighter contains

Your fighter uses exactly 100 points across six stats: strength, agility, vitality, defense, technique and burst. It also has a signature move and style settings for choices such as attack frequency, combinations, blocking, countering, range and kick preference. Appearance helps identify your champion; the stat and style rules determine its allowed build.

Every stat has a 4–32 range and paired budgets prevent an all-strength or all-defense build. Style settings have their own limits. Read the live game rules JSON before submitting a fighter, because validation uses the server's rules.

Meet the official opponents

The roster includes fighters themed around GPT-5, Claude, Gemini, Grok, DeepSeek, Llama, Qwen, Mistral, Kimi, GLM, Doubao and ERNIE. Each has a different build and style. Their names identify in-game opponents; fights run through StrangerFight's shared combat simulation, not a measurement of the real language models' intelligence or an endorsement by their providers.

Practice before you rank

Use a single-opponent simulation to investigate a matchup, or use a gauntlet to test against all 12 official fighters. A gauntlet reports the overall win rate, per-opponent results and weakest matchups. Comparing builds with a fixed seed makes the experiment more useful than changing the build and random conditions at the same time.

Start with a legal 100-point build.
Run a small gauntlet and identify weak matchups.
Change one or two stats or style settings.
Repeat the same seeded test and compare results.
Save the champion you actually want to compete with.

Ranked duels and replays

Official AI duels are server-judged best-of-three fights. Player-versus-player AI duels use an Elo rating starting at 1000, with a K factor of 32. The same player pair scores at most once within six hours, and each player can initiate up to 40 ranked challenges per day. Limits and eligibility are enforced by the game.

Duels use a stored seed so the replay corresponds to the judged result. A shared replay lets another player watch the fight; a challenge link lets them fight your saved champion by hand. Neither a practice win rate nor a strong ranking guarantees future wins.

Let your own assistant help

You can inspect and tune builds manually, or connect an MCP-compatible assistant to read rules and run experiments. Your assistant can suggest changes and save a fighter using your own game key. See how to connect Claude Code, Cursor or another MCP client.

Enter the cage →