PixVerse V6 Max Is Live: Text-to-Video and Image-to-Video Parameters, Pricing and Prompts

PixVerse V6 Max is now available on HiAPI.ai as two models: pixverse-v6-max/text-to-video and pixverse-v6-max/image-to-video. Both generate 1–15 second videos from 360p to 1080p, and can generate audio together with the picture. This post covers the parameters, pricing and prompt tips.

Which model to use

• Text-to-video: prompt only, with 8 aspect ratios: 16:9, 4:3, 1:1, 3:4, 9:16, 2:3, 3:2 and 21:9 (default 16:9).
• Image-to-video: send one image as the first frame (JPEG, PNG or WebP, up to 20 MB). The output follows that image's aspect ratio. Prompts can be up to 2048 characters here, and up to 5000 for text-to-video.

Parameters

• duration: whole seconds from 1 to 15, default 5, billed per second.
• resolution: 360p, 540p, 720p or 1080p, default 720p.
• generate_audio: off by default. When on, the model adds background music, sound effects and dialogue. To make a character speak, put the line in quotes in the prompt.
• seed: 0–2147483647. The same seed and prompt give similar results, which helps when fine-tuning.

Pricing

You pay per output second, by resolution and audio setting:

For example, 720p for 10 seconds with audio off costs 10 × $0.0559 = $0.559. Try prompts at 360p or 540p with short durations first, then render the final clip at 720p or 1080p.

Request examples

Text-to-video:

curl https://api.hiapi.ai/v1/tasks \
  -H "Authorization: Bearer $HIAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "pixverse-v6-max/text-to-video",
    "input": {
      "prompt": "A red fox trots across a snowy ridge at sunrise, low tracking shot, breath visible in the cold air",
      "duration": 5,
      "resolution": "720p",
      "aspect_ratio": "16:9",
      "generate_audio": false
    }
  }'

For image-to-video, change the model name and put the first frame in image_urls:

{
  "model": "pixverse-v6-max/image-to-video",
  "input": {
    "image_urls": ["https://example.com/first-frame.jpg"],
    "prompt": "The lantern sways gently as snow keeps falling, slow push-in",
    "duration": 5,
    "resolution": "720p",
    "generate_audio": true
  }
}

The response returns a task ID. Poll GET /v1/tasks/{task_id} for status and the video URL.

Prompt tips

1. Lead with subject and action: who is doing what, with a concrete verb, such as "a fox trots across a snowy ridge" rather than "a beautiful fox".
2. Then the camera: shot size and movement, such as a low tracking shot, slow push-in or orbit.
3. Then light and mood: time of day, weather, color.
4. For image-to-video, describe the change: the first frame already sets the scene, so focus on what moves and how the camera moves.
5. Describe the sound you want: with audio on, name the ambient sound or write dialogue in quotes.

Common uses

• Turn a product photo into a few-second showcase clip (image-to-video with ambient sound).
• Vertical 9:16 clips for social media (text-to-video).
• Storyboard previews: test several shots at 360p, then render the chosen one at 1080p.

Open the Playground on the model page to try it; the price updates as you change parameters.