📊 Arena AI Leaderboards — Daily Snapshots

Auto-updated daily snapshots of every Arena AI (formerly LMSYS Chatbot Arena) leaderboard in structured JSON.

Arena AI doesn't provide a public API. This repo gives you stable, machine-readable data with historical tracking — updated automatically via GitHub Actions.

📁 Data Structure

data/
  latest.json                # → points to the newest snapshot
  2026-03-21/
    _index.json              # Run metadata + per-category stats
    text.json                # Text & chat (LLM)
    code.json                # Code generation
    vision.json              # Image & multimodal understanding
    document.json            # PDF & document understanding
    text-to-image.json       # AI image generation
    image-edit.json          # Image editing
    search.json              # AI-powered search
    text-to-video.json       # AI video generation
    image-to-video.json      # Image-to-video generation
    video-edit.json          # Video editing
  2026-03-20/
    ...

🔌 Quick Access

REST API (recommended)

Free, no auth needed. Hosted on api.wulong.dev:

# List all leaderboards with model counts
curl https://api.wulong.dev/arena-ai-leaderboards/v1/leaderboards

# Get a specific leaderboard (latest)
curl https://api.wulong.dev/arena-ai-leaderboards/v1/leaderboard?name=text

# Get a specific date
curl https://api.wulong.dev/arena-ai-leaderboards/v1/leaderboard?name=text-to-video&date=2026-03-21

Raw GitHub JSON

# Latest snapshot pointer
curl https://raw.githubusercontent.com/oolong-tea-2026/arena-ai-leaderboards/main/data/latest.json

# Today's LLM leaderboard
curl https://raw.githubusercontent.com/oolong-tea-2026/arena-ai-leaderboards/main/data/2026-03-21/text.json

Python

import requests

# Via API
text = requests.get(
    "https://api.wulong.dev/arena-ai-leaderboards/v1/leaderboard?name=text"
).json()

for m in text["models"][:10]:
    print(f"#{m['rank']} {m['model']} ({m['vendor']}) — ELO {m['score']}±{m['ci']}")

📐 JSON Schema

Every leaderboard file follows a unified schema. See schemas/ for formal JSON Schema definitions.

{
  "meta": {
    "leaderboard": "text-to-video",
    "source_url": "https://arena.ai/leaderboard/text-to-video",
    "fetched_at": "2026-03-21T05:12:05+00:00",
    "model_count": 37
  },
  "models": [
    {
      "rank": 1,
      "model": "veo-3.1-audio-1080p",
      "vendor": "Google",
      "license": "proprietary",
      "score": 1381,
      "ci": 8,
      "votes": 5537
    }
  ]
}

Field	Type	Description
rank	int	Position in leaderboard
model	string	Model name as shown on arena.ai
vendor	string | null	Organization (Google, OpenAI, Anthropic, ...)
license	"proprietary" | "open" | null	License category
score	int | null	Arena ELO score
ci	int | null	95% confidence interval (±)
votes	int | null	Total vote count

📜 License

MIT — see LICENSE.

Data sourced from arena.ai. This repo provides structured access to publicly available leaderboard data.

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