{
    "name": "MyTokenTracker AI Cost Index",
    "description": "Equal-weighted average blended price ($/Mtok, 3:1 input:output) of fixed model baskets, over time.",
    "license": "CC BY 4.0",
    "attribution": "Champlin Enterprises, https://mytokentracker.io/cost-index",
    "unit": "USD per 1,000,000 tokens",
    "basket_version": "v1",
    "blend_ratio": "3:1",
    "baskets": {
        "frontier": {
            "anthropic": [
                "claude-opus-4-6",
                "claude-opus-4-1",
                "claude-opus-4-0",
                "claude-3-opus-20240229",
                "claude-3-opus"
            ],
            "openai": [
                "gpt-4o",
                "gpt-4.1",
                "gpt-4-turbo"
            ],
            "google": [
                "gemini-2.5-pro",
                "gemini-pro-latest",
                "gemini-1.5-pro"
            ],
            "mistral": [
                "mistral/mistral-large-latest",
                "mistral/mistral-large-2512",
                "mistral-large-latest"
            ]
        },
        "budget": {
            "anthropic": [
                "claude-haiku-4-5",
                "claude-3-5-haiku",
                "claude-3-5-haiku-latest",
                "claude-3-haiku-20240307"
            ],
            "openai": [
                "gpt-4o-mini",
                "gpt-4.1-mini",
                "gpt-3.5-turbo"
            ],
            "google": [
                "gemini-2.5-flash",
                "gemini-2.0-flash",
                "gemini-1.5-flash"
            ],
            "mistral": [
                "mistral/mistral-small-latest",
                "mistral/mistral-small",
                "mistral-small-latest"
            ],
            "deepseek": [
                "deepseek-chat",
                "deepseek/deepseek-chat"
            ]
        }
    },
    "generated_at": "2026-06-17T13:10:31+00:00",
    "series": {
        "frontier": [
            {
                "date": "2026-06-15",
                "blended_per_mtok": 4.640625,
                "input_per_mtok": 2.3125,
                "output_per_mtok": 11.625,
                "constituents": 4
            },
            {
                "date": "2026-06-16",
                "blended_per_mtok": 4.640625,
                "input_per_mtok": 2.3125,
                "output_per_mtok": 11.625,
                "constituents": 4
            },
            {
                "date": "2026-06-17",
                "blended_per_mtok": 4.640625,
                "input_per_mtok": 2.3125,
                "output_per_mtok": 11.625,
                "constituents": 4
            }
        ],
        "budget": [
            {
                "date": "2026-06-15",
                "blended_per_mtok": 0.7035,
                "input_per_mtok": 0.358,
                "output_per_mtok": 1.74,
                "constituents": 5
            },
            {
                "date": "2026-06-16",
                "blended_per_mtok": 0.7035,
                "input_per_mtok": 0.358,
                "output_per_mtok": 1.74,
                "constituents": 5
            },
            {
                "date": "2026-06-17",
                "blended_per_mtok": 0.7035,
                "input_per_mtok": 0.358,
                "output_per_mtok": 1.74,
                "constituents": 5
            }
        ]
    }
}