Runway Gen-4.5
Runway Gen-4.5 from $0.25/sec — cinematic AI video via REST, billed per second with no monthly plan.
Runway's Gen-4.5 video model. Cinematic 2–10 second clips at 720p in 16:9 or 9:16 with first-frame image-to-video — from $0.25 per second, no subscription.
No credit card required. Takes 30 seconds.
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Enter a prompt and generate a video with Runway Gen-4.5.
Drop image or click to upload
For image-to-video (first/last frame)
Pricing
Per-second: from $0.25/sec (720p)
Endpoint
/v1/media/queue
Strengths
Gen-4.5 carries the cinematic camera language and color that made Runway a staple in film and ad workflows.
Nine duration options starting at 2 seconds, useful for stingers, loops, and transitions where longer generations are wasted spend.
Animate a still by passing it as the first frame — turn key art or a product shot into motion.
Pay per second from a prepaid balance instead of a monthly Runway plan with generation credits.
Quick start
Copy this snippet and start making calls with Runway Gen-4.5.
// Step 1: Submit job
const res = await fetch('https://api.yepapi.com/v1/media/queue', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "runway/gen-4.5",
"prompt": "A slow dolly through an abandoned greenhouse at golden hour, dust motes suspended in the light, ivy pushing through broken panes, shallow depth of field",
"options": {
"aspectRatio": "16:9",
"resolution": "1080p",
"duration": "6"
}
}),
});
const { data } = await res.json();
const jobId = data.jobId;
// Step 2: Poll for result
const status = await fetch(`https://api.yepapi.com/v1/media/status/${jobId}`, {
headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status: "pending" | "processing" | "completed" | "failed"
// job.result: { text?, image?, audio?, video? }Why use Runway Gen-4.5 through YepAPI?
Runway Gen-4.5 API — cinematic video from $0.25/sec
Runway Gen-4.5 generates 2 to 10 second clips at 720p in 16:9 or 9:16, with the cinematic motion and camera work Runway is known for. First-frame conditioning turns a still image into a moving shot.
Through YepAPI you get it as a plain REST call on `/v1/media/queue` with per-second billing from $0.25 — no monthly subscription, no credit packs, no seat licenses.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Runway's Gen-4.5 video model. Cinematic 2–10 second clips at 720p in 16:9 or 9:16 with first-frame image-to-video — from $0.25 per second, no subscription.
Pricing for Runway Gen-4.5 through YepAPI is based on usage. No monthly minimums — you only pay for what you use.
Sign up for a free API key, then send requests to the /v1/media/queue endpoint.
Ready to use Runway Gen-4.5?
$5 free credit on signup. No credit card required. Pay per call.
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