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# Pixverse C1

> Cinema-grade video model for action and effects work, from text, images, first and last frames, or references, with native synchronized audio.

![Pixverse C1](https://media.empiriolabs.ai/model-logos/pixverse-c1.png)

[PixVerse](/providers/pixverse) · Video Generation

`POST /v1/videos/generations`

Cinema-grade video model for action and effects work, from text, images, first and last frames, or references, with native synchronized audio.

## At a glance

| Field               | Value                                                                                                |
| ------------------- | ---------------------------------------------------------------------------------------------------- |
| Model id            | `pixverse-c1`                                                                                        |
| Model release date  | 2026-04-07                                                                                           |
| Input modalities    | Text, Image                                                                                          |
| Output modalities   | Video                                                                                                |
| Context window      | -                                                                                                    |
| Weight precision    | -                                                                                                    |
| Features            | text_to_video, image_to_video, reference_to_video, audio_sync, character_consistency, camera_control |
| Native inference    | No                                                                                                   |
| New                 | No                                                                                                   |
| Supported endpoints | `POST /v1/videos/generations`                                                                        |
| Alternate model ids | `pixverse/c1`                                                                                        |

## Pricing

| Charge                    | Spec       | Rate       |
| ------------------------- | ---------- | ---------- |
| Standard 360p no audio    | per second | \$0.030667 |
| Standard 360p with audio  | per second | \$0.040889 |
| Standard 540p no audio    | per second | \$0.040889 |
| Standard 540p with audio  | per second | \$0.051111 |
| Standard 720p no audio    | per second | \$0.051111 |
| Standard 720p with audio  | per second | \$0.066444 |
| Standard 1080p no audio   | per second | \$0.097111 |
| Standard 1080p with audio | per second | \$0.122667 |

## Example request

```bash
curl https://api.empiriolabs.ai/v1/videos/generations \
  -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"model": "pixverse-c1", "prompt": "sunrise over the ocean", "duration": 6}'
```

## Parameters

| Parameter               | Type    | Required | Default  | Description                                                                                                                                                                                                                                                                                                            |
| ----------------------- | ------- | -------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `prompt`                | string  | yes      | -        | Scene description, up to 2048 characters. In reference mode you can address a named reference inline as @name followed by a space.                                                                                                                                                                                     |
| `mode`                  | enum    | no       | `"auto"` | How your inputs are used. auto detects it from what you attach. t2v is text to video. i2v animates one image. transition interpolates between a first and last frame. reference combines up to 7 reference images, including multi-panel storyboard frames. · Allowed: `auto`, `t2v`, `i2v`, `transition`, `reference` |
| `resolution`            | enum    | no       | `"720p"` | Output resolution. Higher resolutions bill at a higher per-second rate. · Allowed: `360p`, `540p`, `720p`, `1080p`                                                                                                                                                                                                     |
| `aspect_ratio`          | enum    | no       | `"16:9"` | Output aspect ratio. Used by text-to-video and reference modes. Image-driven modes follow the source image instead. · Allowed: `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `2:3`, `3:2`, `21:9`                                                                                                                               |
| `duration`              | number  | no       | `5`      | Clip length in seconds. · Range: 1 – 15                                                                                                                                                                                                                                                                                |
| `generate_audio_switch` | boolean | no       | false    | Generate native synchronized audio with the video. Bills at the higher with-audio rate for the chosen resolution.                                                                                                                                                                                                      |
| `seed`                  | number  | no       | -        | Reproducibility seed. The same seed with the same inputs returns a similar result. · Range: 0 – 2147483647                                                                                                                                                                                                             |
| `reference_names`       | string  | no       | -        | Comma-separated names for the attached reference images, in order, so the prompt can address them as @name.                                                                                                                                                                                                            |
| `image`                 | string  | no       | -        | Source or first-frame image URL.                                                                                                                                                                                                                                                                                       |
| `image_end`             | string  | no       | -        | Last-frame image URL for transition mode.                                                                                                                                                                                                                                                                              |

## Notes

PixVerse C1 is the cinematic tier, tuned for physically grounded character motion, action choreography and effects work, with automatic storyboarding from the prompt.

**Modes**

* `t2v`: text to video.
* `i2v`: animate a single image.
* `transition`: interpolate between a first-frame and a last-frame image.
* `reference`: combine up to 7 reference images, including multi-panel storyboard frames.

**Output**

* 360p, 540p, 720p and 1080p, 1 to 15 seconds.
* Aspect ratios 16:9, 4:3, 1:1, 3:4, 9:16, 2:3, 3:2 and 21:9 on text-to-video and reference modes. Image-driven modes follow the source image.
* Set `generate_audio_switch` to true for native synchronized audio.

**Billing**

* Billed per second of generated video at the rate for the output resolution, with a higher rate when audio is on.

**Input limits**

* Images: PNG, JPEG or WebP, up to 20MB and 10000px on the long edge.

C1 does not support clip extension. Use PixVerse V6 for that.

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*Machine-readable schema:* `GET https://api.empiriolabs.ai/v1/models/pixverse-c1`.