Infinitetalk Fast | AI Digital Human API

infinitetalk-fast

What is infinitetalk-fast?

infinitetalk-fast produces videos with precise lip sync, aligning the head, face, and body movements to the audio. It maintains identity across unlimited-length videos and also offers image-to-video generation, turning static photos into lively speaking or singing videos.

Why it looks great

Accurate lip synchronization: aligns lip motion precisely with audio, preserving natural rhythm and pronunciation.
Full-body coherence: captures head movements, facial expressions, and posture changes beyond the lips.
Identity preservation: maintains consistent facial identity and visual style across frames.
Image-to-video capability: turns static photos into realistic speaking or singing videos.
Instruction following: accepts text prompts to control scene, pose, or behavior while syncing to audio.

How to Use

Upload the audio file.
Upload the image (the person to animate).
(Optional) Upload a mask_image to specify which regions can move.
(Optional) Add a prompt to guide expression, style, or pose.
Set the seed (set a fixed number for reproducibility).
Submit the job and download the result once it's ready.

Pricing

Metric	Value
Price per second	$0.015
Minimum billed duration	5 s
Minimum total price	$0.075
Maximum billed duration	600 s
Maximum total price per run	$9.000

Note

Max clip length per job: up to 10 minutes
Processing speed: approximately 10–30 seconds of wall time per 1 second of video (varies by resolution and queue load)
Mask safety tip: Do not upload the full image as mask_image. The mask should only cover the regions you want to animate—otherwise the result may render as fully black.

More Versions

Reference

Build your own digital human

Infinitetalk Fast API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/wavespeed-ai/infinitetalk-fast with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Infinitetalk Fast below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/infinitetalk-fast" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "image": "https://example.com/your-input.jpg",
    "audio": "https://example.com/your-audio.mp3",
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "seed": -1
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("wavespeed-ai/infinitetalk-fast", {
        "image": "https://example.com/your-input.jpg",
        "audio": "https://example.com/your-audio.mp3",
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "seed": -1
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "wavespeed-ai/infinitetalk-fast",
    {
    "image": "https://example.com/your-input.jpg",
    "audio": "https://example.com/your-audio.mp3",
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "seed": -1
}
)

print(output["outputs"][0])  # → URL of the generated output

Infinitetalk Fast API — Frequently asked questions

What is the Infinitetalk Fast API?

Infinitetalk Fast is a WaveSpeedAI model for talking-avatar generation, exposed as a REST API on WaveSpeedAI. InfiniteTalk fast converts one photo + audio into audio-driven talking or singing avatar videos (Image-to-Video), up to 10 minutes. Ready-to-use REST API, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Infinitetalk Fast API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/wavespeed-ai/infinitetalk-fast.

How much does Infinitetalk Fast cost per run?

Infinitetalk Fast starts at $0.075 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Infinitetalk Fast accept?

Key inputs: `prompt`, `image`, `audio`, `seed`, `mask_image`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/wavespeed-ai/infinitetalk-fast.

How long does Infinitetalk Fast take to generate?

Average end-to-end generation time on WaveSpeedAI is around 251 seconds per request — measured across recent runs. Queue time scales with global demand; live status is visible in the prediction record.

Can I use Infinitetalk Fast outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (WaveSpeedAI). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

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