> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kymaapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Veo 3.1 Fast

> Google Veo 3.1 Fast — 720p video with native audio (dialogue, ambient, lip-sync), including spoken Vietnamese. 4, 6 or 8s. T2V or I2V via image_url.

## Overview

Google Veo 3.1 Fast — 720p video with native audio (dialogue, ambient, lip-sync), including spoken Vietnamese. 4, 6 or 8s. T2V or I2V via image\_url.

## Specs

| Field | Value |
| - | - |
| Model ID | `veo-3.1-fast` |
| Best for | Short clips with speech and sound, talking-head, social video |
| Input modalities | Text, Image |
| Output modalities | Video, Audio |
| Speed | Slow |
| Cost band | Balanced |
| Release stage | Stable |

## Pricing

| | Price |
| - | :-: |
| Per second of video | \$0.135 |

Billed per second of generated video. Every request reports its exact cost in `usage.cost`; the full media price list is on [Pricing](/pricing).

## Example

```python theme={null}
from openai import OpenAI

client = OpenAI(base_url="https://kymaapi.com/v1", api_key="kyma-...")

# Video is POST /v1/videos/generations — it returns a job to poll.
response = client.post(
    "/videos/generations",
    body={"model": "veo-3.1-fast", "prompt": "..."},
)
```

## Agent query example

Ask the API which models fit, instead of hardcoding an id:

```bash theme={null}
curl "https://kymaapi.com/v1/models?recommended_for=generate-video&quality_tier=frontier-open"
```


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