Seedance 2.5 API: Kie AI's video-generation model, one key away
Seedance 2.5 via the ApexApi gateway
Animates a still image into up to 30 seconds of video with synchronized audio, keeping the subject consistent across the full clip. Supports an optional end frame to control where the video lands. Choose it over Seedance 2.0 image-to-video for longer takes and native audio. Call it through ApexApi's unified, OpenAI-compatible API with one `ak-` key, alongside every other model in the catalog. Pricing is $0.555–$4.99/sec per second, billed pay-per-use from your credit balance with no subscription.
Seedance 2.5 is served through ApexApi's unified, OpenAI-compatible API. One key, one format, with smart routing and automatic failover. Provider: Kie AI.
Why Seedance 2.5
AI video generation
Text-to-video (and image-to-video where supported) via a simple async job.
Per-second pricing ($0.555–$4.99/sec)
Pay only for what you generate from your credit balance. No subscription.
OpenAI-compatible
Drop-in with any OpenAI SDK. Change the base URL and key, keep your code.
Specifications
- Modality
- video
- Context window
- —
- Max output
- —
- Streaming
- —
- Tool / function calling
- —
- Vision input
- —
Seedance 2.5 pricing
- For lighter work, Seedance 1.0 Pro from the same maker costs 3.8× less — one string apart on the same key.
Getting started with Seedance 2.5
OpenAI-compatible. Point your client at ApexApi, swap your key, and call it. No new SDK to learn.
import requests, time
job = requests.post(
"https://api.apexapi.dev/v1/videos/generations",
headers={"Authorization": "Bearer <YOUR_APEXAPI_KEY>"},
json={"model": "bytedance/seedance-2.5/image-to-video", "prompt": "A drone shot over a neon city at night", "duration": 5},
).json()
# Poll until the async job completes
while True:
res = requests.get(
f"https://api.apexapi.dev/v1/videos/generations/{job['id']}",
headers={"Authorization": "Bearer <YOUR_APEXAPI_KEY>"},
).json()
if res["status"] in ("completed", "failed"):
print(res)
break
time.sleep(3)Seedance 2.5 use cases
What teams build with Seedance 2.5 on ApexApi.
Short-form content
Generate clips for social, ads, and marketing.
Product & explainer
Turn prompts or images into motion for launches and demos.
Creative prototyping
Explore video concepts fast before a full production.
Seedance 2.5 vs other models
How it compares, and on ApexApi you can switch between any of them with a single string change, same key, same endpoint.
Seedance 2.5 vs Veo 3.1
Compare Seedance 2.5 against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Veo 3.1 API →Seedance 2.5 vs Seedance 2.0
Compare Seedance 2.5 against this model on price, capabilities, and latency. A/B them with a single key on ApexApi.
Learn more about Seedance 2.0 API →Seedance 2.5 API: FAQ
How do I call Seedance 2.5 through ApexApi?
Create an ApexApi key, point your client at https://api.apexapi.dev/v1, and POST to /v1/videos/generations with the model set to `bytedance/seedance-2.5/image-to-video`. The API is OpenAI-compatible, so an existing OpenAI SDK works once you change the base URL and key.
How much does Seedance 2.5 cost on ApexApi?
$0.555–$4.99/sec, billed per second with no subscription or minimum. The exact figure is shown before you generate, so nothing is charged against a price you have not seen.
What do I send to Seedance 2.5?
This variant takes a still image to use as the first frame, plus a prompt describing the motion. The other variants of the same model accept different inputs, so pick the slug that matches what you already have.
What should I use instead of Seedance 2.5?
From the same maker, Seedance 2.0 costs less for lighter work. Switching is one string: it runs on the same endpoint and the same key, so there is nothing to re-integrate.
Ready to build with Seedance 2.5?
One API key. Every major AI model. Pay only for what you use.
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