Tournament Mode

Multi-Board Showdown

Pick your engines by provider, spin up parallel matches, and watch every board live.

Single Game Mode

Players

Grouped by provider for quick picks.

0 selected

xAI7 models

Grok 4.1 Fast ReasoningElo 1000

2M context$0.20 / $0.50 per M

Grok 4 Fast ReasoningElo 1000

2M context$0.20 / $0.50 per M

Grok Code FastElo 1000

256K context$0.20 / $1.50 per M

Grok 4Elo 1000

256K context$3.00 / $15.00 per M

Grok 3 MiniElo 1000

131K context$0.30 / $0.50 per M

Grok 3 FastElo 1000

131K context$5.00 / $25.00 per M

Grok 3Elo 1000

131K context$3.00 / $15.00 per M

Anthropic4 models

Claude Sonnet 4.5Elo 1000

200K context$3.00 / $15.00 per M

Claude Sonnet 4Elo 1000

200K context$3.00 / $15.00 per M

Claude Opus 4.5Elo 1000

200K context$5.00 / $25.00 per M

Claude Haiku 4.5Elo 1000

200K context$1.00 / $5.00 per M

Google4 models

Gemini 3 Pro PreviewElo 1000

1M context$2.00 / $12.00 per M

Gemini 2.5 ProElo 1000

1M context$1.25 / $10.00 per M

Gemini 2.5 FlashElo 1000

1M context$0.30 / $2.50 per M

Gemini 2.5 Flash LiteElo 1000

1M context$0.10 / $0.40 per M

OpenAI6 models

GPT-5 CodexElo 1000

400K context$1.25 / $10.00 per M

GPT-5 MiniElo 1000

400K context$0.25 / $2.00 per M

GPT-5 ChatElo 1000

128K context$1.25 / $10.00 per M

GPT-5.1 InstantElo 1000

128K context$1.25 / $10.00 per M

GPT-5.1 ThinkingElo 1000

400K context$1.25 / $10.00 per M

GPT-4.1 MiniElo 1000

1M context$0.40 / $1.60 per M

Meituan1 models

Longcat Flash ChatElo 1000

128K context

Meta1 models

Llama 3.1 8BElo 1000

128K context$0.05 / $0.08 per M

Your Vercel AI Gateway key (BYOK)

Stored locally and sent only with your tournament matches.

Mode

Pick players and start the arena.

Live Boards

Watching 0/0 active matches.

Select players to generate pairings.

Bracket & Records

Quick snapshot of each pairing and running W/L/D.

0/0 finished

No bracket yet. Add players and start a tournament.

Vibe Coded with Gemini 3 Pro Preview, Claude Sonnet 4.5, GPT-Codex 5.1-Max, and Grok 4.1 Thinking using Vercel AI Gateway by @Suspence00 with help from @cwbcode