Tokens
to Dollars.
The API that turns token usage into real dollars instantly. Clear, direct, and easy to wire into your stack. Use for comparing between models, or keeping track of dollar costs in real time.
Tokens
How It Works
You've just made an API call to an LLM
You're holding the response, which includes token usage.
You prune the response and forward it to us
Pruning keeps your prompts and completions private.
We Calculate Cost
We identify model and pricing tier, do the calculations, and send you the cost in dollars.
You send us your pruned response
{
"id": "chatcmpl-E8h2cFyj5u8HXMpvhj1zwvy0ADEQm",
"object": "chat.completion",
"created": 1785740782,
"model": "gpt-4o-2024-08-06",
"choices": ["pruned"],
"usage": {
"prompt_tokens": 233256,
"completion_tokens": 110,
"total_tokens": 233366,
"prompt_tokens_details": {
"cached_tokens": 0,
"audio_tokens": 0
},
"completion_tokens_details": {
"reasoning_tokens": 0,
"audio_tokens": 0,
"accepted_prediction_tokens": 0,
"rejected_prediction_tokens": 0
}
},
"service_tier": "default",
"system_fingerprint": "fp_e160a45017"
}
We send you the cost in dollars
{
"success": true,
"cost_usd": 0.58424,
"provenance": {
"url": "https://developers.openai.com/api/docs/pricing.md",
"last_scraped_at": "2026-07-31 12:54:59 UTC",
"pricing_object_extracted_at": "2026-07-31 13:19:32 UTC"
},
"calculations_usd": [
"233256 prompt tokens at $2.5/million = USD 0.58314.",
"110 completion tokens at $10/million = USD 0.00110.",
"Total all tokens = USD 0.58424."
]
}
Built for Developers
Good Coverage
Most models from OpenAI, Google and Anthropic are covered. New models are added regularly.
Easy Integration
Simple REST API with a useful free tier.
Transparent
Every response includes provenance for the pricing data, as well as calculation details.