Decisions API pricing: cost per call, packs and a cost calculator

Credit packs

Buy Decisions API credits

One credit is one call with up to 4,000 input tokens, however many questions it asks. No subscription, credits never expire, failed calls are free.

starter

$5

5,000 calls

$1.00 per 1,000 calls

build

$20

25,000 calls

$0.80 per 1,000 calls · save 20%

scale

$100

150,000 calls

$0.67 per 1,000 calls · save 33%

Already have a key? Top it up instead

Your API key

Credits are added to this key. Leave it empty to get a new key.

Prices in US dollars. Secure checkout by Stripe; your key appears right after payment. Unused credits are refundable for 14 days (Refund Policy). By buying you agree to the Terms. Questions: contact us.

Cost per call

What a Decisions API call costs

One credit covers a call with up to 4,000 input tokens. Most calls are far smaller, so almost every call costs exactly one credit. Typical sizes:

Context	Input tokens per call
A short support ticket	~80
A customer email	~400
A product listing with attributes	~700
A 20-message chat transcript	~2,000
An agent’s full working state	~8,000

Asking several questions about the same context in one request still costs one credit, not one per question. That is usually the cheapest way to use the Decisions API.

Calculator

Estimate your monthly Decisions API cost

Larger packs cost less per call. Output is never billed.

Input tokens per call Calls per month

Credits per call 1 per started 4,000 input tokens

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Starter pack rate $1.00 per 1,000 credits

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Scale pack rate $0.67 per 1,000 credits

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FAQ

Decisions API pricing FAQ

Is there a free tier for the Decisions API?

There is no free tier. The starter pack is $5 for 5,000 calls, enough to wire up a real workflow and measure accuracy on your own data, and unused credits are refundable for 14 days.

What counts as one credit?

One call with up to 4,000 input tokens, however many questions it asks. A larger call costs one more credit for every further 4,000 tokens. Output is never billed.

Do credits expire?

No. Credits stay on your key until you use them. Top up the same key any time from this page.

Do failed requests count?

No. Requests that return a 4xx or 5xx error are not billed.

How much does the OpenAI Decisions API cost?

As of September 30, 2026, OpenAI has not published separate pricing for its Decisions API, which is in limited preview. You can call this Decisions API today with prepaid credits.

Do you offer volume pricing?

The larger packs are cheaper per call. If you expect to run millions of Decisions API calls a month, get in touch and we will agree committed rates.