Site is published to https://www.llm-prices.com/ using Cloudflare Pages.

Background on this project

The pricing data is available as JSON at the following URLs:

https://www.llm-prices.com/current-v1.json

An object containing:

• updated_at: Date when the pricing data was last updated (ISO 8601 format)
• prices: Array of objects representing the current pricing for each model

Each price object contains:

• id: Unique identifier for the model
• vendor: The vendor/provider name
• name: Human-readable model name
• input: Price per million input tokens (in USD)
• output: Price per million output tokens (in USD)
• input_cached: Price per million cached input tokens (in USD), or null if the model does not offer cached token pricing

Example:

{
  "updated_at": "2025-10-10",
  "prices": [
    {
      "id": "amazon-nova-micro",
      "vendor": "amazon",
      "name": "Amazon Nova Micro",
      "input": 0.035,
      "output": 0.14,
      "input_cached": null
    },
    {
      "id": "amazon-nova-lite",
      "vendor": "amazon",
      "name": "Amazon Nova Lite",
      "input": 0.06,
      "output": 0.24,
      "input_cached": null
    }
  ]
}

https://www.llm-prices.com/historical-v1.json

An object containing:

• prices: Array of objects representing all pricing records including historical changes

Each price object contains the same fields as current prices plus:

• from_date: Start date for this pricing (ISO 8601 format, or null for current prices). This date is inclusive.
• to_date: End date for this pricing (ISO 8601 format, or null for current prices). This date is exclusive - the price was valid up to but not including this date.

Example:

{
  "prices": [
    {
      "id": "amazon-nova-lite",
      "vendor": "amazon",
      "name": "Amazon Nova Lite",
      "input": 0.06,
      "output": 0.24,
      "input_cached": null,
      "from_date": null,
      "to_date": null
    },
    {
      "id": "amazon-nova-micro",
      "vendor": "amazon",
      "name": "Amazon Nova Micro",
      "input": 0.035,
      "output": 0.14,
      "input_cached": null,
      "from_date": null,
      "to_date": null
    }
  ]
}

The pricing data is maintained in individual JSON files in the data/ directory, with one file per vendor (e.g., data/anthropic.json, data/openai.json).

Each vendor file has the following structure:

{
  "vendor": "anthropic",
  "models": [
    {
      "id": "claude-3.7-sonnet",
      "name": "Claude 3.7 Sonnet",
      "price_history": [
        {
          "input": 3,
          "output": 15,
          "input_cached": null,
          "from_date": null,
          "to_date": null
        }
      ]
    }
  ]
}

• vendor: The vendor identifier (lowercase, used to group models)
• models: Array of model objects, each containing:
  • id: Unique identifier for the model (used in URLs and as a key)
  • name: Human-readable display name for the model
  • price_history: Array of pricing records over time, each with:
    • input: Price per million input tokens (in USD)
    • output: Price per million output tokens (in USD)
    • input_cached: Price per million cached input tokens (in USD), or null if the model does not offer cached token pricing
    • from_date: Start date for this pricing (ISO 8601 format, or null for current/initial prices)
    • to_date: End date for this pricing (ISO 8601 format, or null for current prices)

When a model's price changes, add a new entry to the price_history array:

• Set the to_date on the previous entry to the date the old price ended
• Add a new entry with the new prices, setting from_date to when the new price starts and to_date to null

• from_date: Inclusive start date (price is effective starting from this date)
• to_date: Exclusive end date (price is effective up to but NOT including this date)
• null dates: from_date: null means "from the beginning", to_date: null means "current price"

After editing vendor files in data/, run:

python scripts/build.py

This generates current-v1.json and historical-v1.json files that are served on the website.