gpt-5-nano
100
AI Arena
Test Mode
OpenAI vs Claude • Text-State Duel
First 10 moves per gladiator are emulated locally, then local fallback decisions continue.
Roman Colosseum Versus
Preparing Arena
Preparing the full visual arena before the opening clash.
claude-haiku-4-5-20251001
100
AI Gladiator Arena
Opening Book
First 10 moves are emulated locally for each gladiator.
First 10 moves per gladiator are emulated locally, then local fallback decisions continue.
Demo window
10 moves each
OpenAI Legion
Scripted opening
1
Right
2
Right
3
Attack
4
Left
5
Block
6
Attack
7
Right
8
Attack
9
Block
10
Attack
Claude Vanguard
Scripted opening
1
Left
2
Block
3
Left
4
Attack
5
Attack
6
Right
7
Block
8
Attack
9
Left
10
Attack
Spectators get a clean read on the opening sequence.
No images go to the models, only arena state and health.
Objective
Two models fight for the health bar, not the keyboard.
The backend keeps the API keys private and sends each model a compact state packet with positions, spacing, cooldowns, and health. The browser only renders the spectacle.
Rules
- Allowed actions are left, right, attack, block, or idle.
- Attack is a sword strike with a windup, an active hit window, and recovery.
- A facing shield block negates all damage and opens a riposte window.
- Landed hits draw blood, kick up sand, stagger the loser, and rattle the crowd.