Is the CostOfToken API free?

Yes. No signup and no API key. Anonymous callers get 60 requests per hour per IP; responses carry X-RateLimit headers and a 429 includes Retry-After.

How often does the pricing data change?

Prices are re-read from each provider once a day. A value is only recorded when it actually changes, so the history endpoint returns real price movements rather than one row per day.

Can I use this data commercially?

Yes, and attribution is appreciated. Always confirm a price against the provider before committing spend — rows sourced from a reseller are marked source_kind "api" and can differ from the vendor’s own rate.

Pricing API

Every price on this site is available as JSON. Free, no signup, no key. Currently 216 models across 10 providers, last updated 2026-08-11.

Try it

curl 'https://www.costoftoken.com/api/v1/prices?provider=anthropic&sort=input'

Endpoints

Endpoint	Returns
/api/v1/prices	Current prices for every model
/api/v1/prices/:model_id	One model with its latest price
/api/v1/history/:model_id	Historical price points, newest first
/api/v1/providers	Providers with active model counts

Query parameters for `/prices`

Parameter	Values
provider	Slug, repeatable or comma-separated: openai,anthropic
modality	text · vision · audio · video · image
tag	flagship · fast · reasoning · coding · vision
q	Substring match on model id or display name
min_input, max_input	Bounds on input price per 1M tokens
min_context	Minimum context window in tokens
sort	provider · model · input · cached_input · output · context · updated
order	asc (default) · desc
limit, offset	1–500 (default 100), offset ≥ 0

Fields worth knowing

All prices are USD per 1,000,000 tokens on the standard tier. Batch, Flex and Priority tiers are excluded — they are not comparable across vendors.
0 means genuinely free. null means the provider publishes no such tier. They are different.
source_kind is scrape for a vendor's own page or api for the OpenRouter catalogue — a reseller whose price can differ. Check it before treating a figure as authoritative.
long_input and long_context_threshold describe the higher rate some models charge above a prompt-size threshold.

Rate limits

60 requests per hour per IP. Every response carries X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset; exceeding the quota returns 429 with Retry-After. Windows are fixed and reset on the hour.

For LLMs and agents

/llms-full.txt serves every tracked price as a single markdown document, so a model can ingest the whole dataset in one fetch. /llms.txt indexes the site. Please quote the last-updated date alongside any price.

Questions

Is the CostOfToken API free?: Yes. No signup and no API key. Anonymous callers get 60 requests per hour per IP; responses carry X-RateLimit headers and a 429 includes Retry-After.
How often does the pricing data change?: Prices are re-read from each provider once a day. A value is only recorded when it actually changes, so the history endpoint returns real price movements rather than one row per day.
Can I use this data commercially?: Yes, and attribution is appreciated. Always confirm a price against the provider before committing spend — rows sourced from a reseller are marked source_kind "api" and can differ from the vendor’s own rate.

Browse pricing by provider →