{
  "today": "2026-07-31",
  "leaderboard": {
    "as_of": "2026-07-27",
    "source": "Official Arena Text Arena default overall leaderboard (style control on, factuality adjustment off): https://arena.ai/leaderboard/text/overall. Ratings captured 2026-07-31 from the leaderboard dated 2026-07-27. This matches the June chart's original capability ruler. Claude Opus 5 and Kimi K3 use the Max rows; GPT-5.6 uses Sol xHigh, the only GPT-5.6 tier then present on the matching leaderboard. Terra and Luna are retained below as research-only records because only no-style-control Text Arena scores were available. Preliminary status is preserved where Arena marks it. Prices use first-party provider announcements/docs current on 2026-07-31 where available; hosted open-weight prices are explicitly identified."
  },
  "models": [
    {
      "name": "Claude Opus 5 Max",
      "arena_id": "claude-opus-5-max",
      "provider": "Anthropic",
      "release_date": "2026-07-24",
      "lmarena_elo": 1495,
      "input_price": 5,
      "output_price": 25,
      "is_open_weight": false,
      "preliminary": true,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1495 +/- 12, rank 5, 2,386 votes; marked Preliminary on the 2026-07-27 leaderboard.",
      "price_note": "Anthropic launch price: $5 input / $25 output per 1M tokens on all platforms.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://www.anthropic.com/news/claude-opus-5"
      ]
    },
    {
      "name": "GPT-5.6 Sol xHigh",
      "arena_id": "gpt-5.6-sol-xhigh",
      "provider": "OpenAI",
      "release_date": "2026-07-09",
      "lmarena_elo": 1485,
      "input_price": 5,
      "output_price": 30,
      "is_open_weight": false,
      "preliminary": false,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1485 +/- 7, rank 13, 8,359 votes on the 2026-07-27 leaderboard.",
      "price_note": "OpenAI standard API price: $5 input / $30 output per 1M tokens; unchanged in the July 30 price update.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://openai.com/index/gpt-5-6/",
        "https://openai.com/index/advancing-the-price-performance-frontier-with-gpt-5-6/"
      ]
    },
    {
      "name": "GPT-5.6 Terra xHigh",
      "arena_id": "gpt-5.6-terra-xhigh",
      "provider": "OpenAI",
      "release_date": "2026-07-09",
      "lmarena_elo": 1449,
      "input_price": 2,
      "output_price": 12,
      "is_open_weight": false,
      "include_in_chart": false,
      "preliminary": false,
      "confidence": "high",
      "elo_note": "Research-only: Arena Text no-style-control overall was 1449 +/- 7, rank 39, 8,621 votes on 2026-07-27. Excluded from the chart because the matching default-overall score was not available.",
      "price_note": "OpenAI standard API price from the July 30 reduction: $2 input / $12 output per 1M tokens.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall-no-style-control",
        "https://openai.com/index/advancing-the-price-performance-frontier-with-gpt-5-6/"
      ]
    },
    {
      "name": "GPT-5.6 Luna xHigh",
      "arena_id": "gpt-5.6-luna-xhigh",
      "provider": "OpenAI",
      "release_date": "2026-07-09",
      "lmarena_elo": 1429,
      "input_price": 0.2,
      "output_price": 1.2,
      "is_open_weight": false,
      "include_in_chart": false,
      "preliminary": false,
      "confidence": "high",
      "elo_note": "Research-only: Arena Text no-style-control overall was 1429 +/- 7, rank 75, 8,890 votes on 2026-07-27. Excluded from the chart because the matching default-overall score was not available.",
      "price_note": "OpenAI standard API price from the July 30 reduction: $0.20 input / $1.20 output per 1M tokens.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall-no-style-control",
        "https://openai.com/index/advancing-the-price-performance-frontier-with-gpt-5-6/"
      ]
    },
    {
      "name": "Kimi K3 Max",
      "arena_id": "kimi-k3-max",
      "provider": "Moonshot AI",
      "release_date": "2026-07-16",
      "lmarena_elo": 1486,
      "input_price": 3,
      "output_price": 15,
      "is_open_weight": true,
      "preliminary": true,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1486 +/- 10, rank 11, 3,559 votes; marked Preliminary on the 2026-07-27 leaderboard.",
      "price_note": "Kimi K3 flat API price: $3 input / $15 output per 1M tokens; 1M context. Kimi documentation describes K3 as open-source and records the full-weight release for July 27.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://platform.kimi.ai/docs/guide/kimi-k3-quickstart",
        "https://platform.kimi.ai/docs/pricing/chat-k3",
        "https://www.kimi.com/help/agent/agent-overview"
      ]
    },
    {
      "name": "Claude Sonnet 5 High",
      "arena_id": "claude-sonnet-5-high",
      "provider": "Anthropic",
      "release_date": "2026-06-30",
      "lmarena_elo": 1460,
      "input_price": 3,
      "output_price": 15,
      "is_open_weight": false,
      "preliminary": false,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1460 +/- 6, rank 43, 15,622 votes on the 2026-07-27 leaderboard.",
      "price_note": "Chart uses Anthropic's durable standard price of $3 input / $15 output per 1M tokens. Introductory pricing of $2 / $10 runs only through 2026-08-31.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://www.anthropic.com/news/claude-sonnet-5",
        "https://platform.claude.com/docs/en/about-claude/models/whats-new-sonnet-5"
      ]
    },
    {
      "name": "Gemini 3.6 Flash",
      "arena_id": "gemini-3.6-flash",
      "provider": "Google",
      "release_date": "2026-07-21",
      "lmarena_elo": 1482,
      "input_price": 1.5,
      "output_price": 7.5,
      "is_open_weight": false,
      "preliminary": true,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1482 +/- 8, rank 15, 6,065 votes; marked Preliminary on the 2026-07-27 leaderboard.",
      "price_note": "Google launch price: $1.50 input / $7.50 output per 1M tokens.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-6-flash-3-5-flash-lite-3-5-flash-cyber/"
      ]
    },
    {
      "name": "Gemini 3.5 Flash-Lite",
      "arena_id": "gemini-3.5-flash-lite",
      "provider": "Google",
      "release_date": "2026-07-21",
      "lmarena_elo": 1460,
      "input_price": 0.3,
      "output_price": 2.5,
      "is_open_weight": false,
      "preliminary": true,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1460 +/- 8, rank 44, 6,015 votes; marked Preliminary on the 2026-07-27 leaderboard.",
      "price_note": "Google launch price: $0.30 input / $2.50 output per 1M tokens.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-6-flash-3-5-flash-lite-3-5-flash-cyber/"
      ]
    },
    {
      "name": "Muse Spark 1.1",
      "arena_id": "muse-spark-1.1",
      "provider": "Meta",
      "release_date": "2026-07-09",
      "lmarena_elo": 1491,
      "input_price": 1.25,
      "output_price": 4.25,
      "is_open_weight": false,
      "preliminary": true,
      "confidence": "high",
      "elo_note": "Arena Text default overall: 1491 +/- 7, rank 8, 9,941 votes; marked Preliminary on the 2026-07-27 leaderboard.",
      "price_note": "Arena-listed Meta Model API price: $1.25 input / $4.25 output per 1M tokens.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://ai.meta.com/blog/introducing-muse-spark-meta-model-api/"
      ]
    },
    {
      "name": "Hy3",
      "arena_id": "hy3",
      "provider": "Tencent",
      "release_date": "2026-07-06",
      "lmarena_elo": 1457,
      "input_price": 0.13,
      "output_price": 0.53,
      "is_open_weight": true,
      "preliminary": false,
      "confidence": "medium",
      "elo_note": "Arena Text default overall: 1457 +/- 10, rank 46, 3,267 votes on the 2026-07-27 leaderboard.",
      "price_note": "Open-weight model with no single official list price; chart uses Arena's hosted-inference listing of $0.13 input / $0.53 output per 1M tokens.",
      "sources": [
        "https://arena.ai/leaderboard/text/overall",
        "https://www.tencent.com/tencent-hunyuan-officially-releases-hy3-advancing-agent-capabilities-and-deeper-product-integration/",
        "https://huggingface.co/tencent/Hy3"
      ]
    }
  ]
}