How can I lower my OpenAI API bill?

Batch requests at half price, cache repeated prompt prefixes, route simple requests to smaller models, and buy credits where a dollar of usage costs least.

Checked 2026-10-01

Free OpenAI API credits

OpenAI doesn't advertise a signup credit for the API. What exists: up to $1,000 for safety researchers, complimentary daily tokens if your organization shares traffic with OpenAI, and Azure credits through Microsoft for Startups.

Signup credit
Not available
We found no free signup credit advertised on OpenAI's pages today; the API runs on prepaid billing.
Source: OpenAI pricing
Complimentary tokens for sharing data
If you qualify
Eligible organizations that opt in to share API inputs and outputs with OpenAI get free daily usage on that shared traffic. Check Settings → Data controls → Sharing in your dashboard for your daily allowance; it doesn't cover fine-tuning or tools.
Source: OpenAI Help Center
Researcher Access Program
If you qualify
Up to $1,000 of API credits for early-stage researchers working on safety and responsible AI. Reviewed every quarter; credits expire a year after the award.
Source: OpenAI Researcher Access
Microsoft for Startups (Azure)
If you qualify
Up to $150,000 in Azure credits across eligible services, AI included, for accepted startups.
Source: microsoft.com/startups

When free runs out: cheaper OpenAI usage

OpenAI models cost the same per token everywhere; the credits don't. Live quotes for $100 of usage, and every OpenAI model's price.

#	Where you buy	You payYou pay for $100.00 of usage	vs list price	Price source
1	OrbioCardCheapest right now Credits from a discount book, plus a 5% platform fee and card processing, both included in the quote.	$85.10 incl. $2.60 card processing	-14.9%	live quote
2	smaaartCard Credits from a discount book, plus a 5% platform fee on face value. Card processing and taxes shown at checkout.	$95.00 + card processing and tax at checkout (not in this number)	-5.0%	live quote
3	Direct from the labCard Prepaid credits at face value (OpenAI, Anthropic, Google…). Taxes may apply.	$100.00 no top-up fee	list price	face value
4	OpenRouterCrypto 5% on crypto purchases. No markup on model prices.	$105.00 fees included	+5.0%	published fee
5	OpenRouterCard 5.5% on card purchases, $0.80 minimum. No markup on model prices.	$105.50 fees included	+5.5%	published fee

Disclosure: this site is run by the team behind smaaart, one of the options compared. Tables are ranked by price only, from live quotes and published fees, including when smaaart isn't first. How we compare

Free OpenAI API credits

Signup credit

Complimentary tokens for sharing data

Researcher Access Program

Microsoft for Startups (Azure)

When free runs out: cheaper OpenAI usage

FAQ

Is the OpenAI API free?

How can I lower my OpenAI API bill?