AI video API · Runway
Runway Gen 4.5 API pricing per second
Generate video with Runway's Runway Gen 4.5 through the Cut.Pro API. You see the price before you generate and pay only for what you use.
- Pay as you go, no subscription
- 15 free credits on a new account
- Free quote before every call
From$0.20per secondR$0.67 · 12 credits5 seconds at 1080p: $1.00Updated November 10, 2026
Pricing
Runway Gen 4.5 pricing by mode and resolution
| Mode | Resolution | Price per second | In reais | Credits |
|---|---|---|---|---|
| From an image | 1080p | $0.20 | R$0.67 | 12 credits |
| Text only | 1080p | $0.20 | R$0.67 | 12 credits |
Updated November 10, 2026. Prices use the cheapest credit pack: 1 credit costs $0.0179 (R$0.0599).
Limits
What Runway Gen 4.5 accepts in each request
- Modes
- From an image and Text only
- Duration
- 5 or 10 seconds
- Resolutions
- 1080p
- Aspect ratios
- 21:9, 16:9, 4:3, 1:1, 3:4, 9:16
- Reference images
- up to 1
Code
How to call Runway Gen 4.5 free quote, generation and result
BODY='{"model":"runway/runway-gen-4.5","prompt":"a dog surfing at sunset","seconds":5,"resolution":"1080p","aspect_ratio":"9:16"}'
CREDITS=$(curl -s -X POST https://api.cut.pro/api/v1/generations/quote \
-H "X-Api-Key: $CUTPRO_API_KEY" \
-H "Content-Type: application/json" \
-d "$BODY" | jq .credits)
curl -X POST "https://api.cut.pro/api/v1/generations?wait=60" \
-H "X-Api-Key: $CUTPRO_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d "$(jq -c --argjson credits "$CREDITS" '. + {credits: $credits}' <<< "$BODY")"const api = "https://api.cut.pro/api/v1";
const headers = { "X-Api-Key": process.env.CUTPRO_API_KEY, "Content-Type": "application/json" };
const body = {
model: "runway/runway-gen-4.5",
prompt: "a dog surfing at sunset",
seconds: 5,
resolution: "1080p",
aspect_ratio: "9:16",
};
const quote = await fetch(`${api}/generations/quote`, { method: "POST", headers, body: JSON.stringify(body) }).then((res) => res.json());
let generation = await fetch(`${api}/generations?wait=60`, {
method: "POST",
headers: { ...headers, "Idempotency-Key": crypto.randomUUID() },
body: JSON.stringify({ ...body, credits: quote.credits }),
}).then((res) => res.json());
while (generation.status === "processing") {
generation = await fetch(`${api}/generations/${generation.id}?wait=60`, { headers }).then((res) => res.json());
}
console.log(generation.output?.url ?? generation.error_code);import os, uuid, requests
API = "https://api.cut.pro/api/v1"
headers = {"X-Api-Key": os.environ["CUTPRO_API_KEY"]}
body = {
"model": "runway/runway-gen-4.5",
"prompt": "a dog surfing at sunset",
"seconds": 5,
"resolution": "1080p",
"aspect_ratio": "9:16",
}
quote = requests.post(f"{API}/generations/quote", json=body, headers=headers).json()
generation = requests.post(
f"{API}/generations",
params={"wait": 60},
json={**body, "credits": quote["credits"]},
headers={**headers, "Idempotency-Key": str(uuid.uuid4())},
).json()
while generation["status"] == "processing":
generation = requests.get(f"{API}/generations/{generation['id']}", params={"wait": 60}, headers=headers).json()
print(generation["output"]["url"] if generation["status"] == "ready" else generation["error_code"])Read the docsQuestions
API questions before your first call
- At 1080p, each second costs $0.20 and a minute comes to $11.97 (R$40.05, 669 credits). Each generation runs 5 or 10 seconds.
- Create an account, generate an API key, and request a free quote. The smallest Runway Gen 4.5 generation costs 56 credits, more than the 15 free credits, so you can use them to try a lower-cost model in the catalog.
- From an image: the image you send becomes the first frame. Text only: the prompt describes everything.
- No. Buy a credit pack by card, or in reais with Pix from Brazil, and spend it on Runway Gen 4.5 and every other model with the same key.
- No. The Cut.Pro key calls Runway Gen 4.5 without a Runway account, with one balance for every model in the catalog.
- Yes. With a CPF or CNPJ and full address in your billing details, the nota fiscal is issued after each payment is confirmed.
Still missing one? Help center
Compare
Other models of the same kind
- Wan 3Alibaba · from $0.11 per secondSee price
- Kling O3 ProKling · from $0.25 per secondSee price
- Kling 3.0 ProKling · from $0.25 per secondSee price
- Kling 3.0 StandardKling · from $0.19 per secondSee price
- Seedance 2.0 FastByteDance · from $0.0722 per secondSee price
- Seedance 2.0ByteDance · from $0.24 per secondSee price
Generate with Runway Gen 4.5 today
Create a key, get a free quote and pay only for what you generate.
Create API key