# CogVideoX-3

> CogVideoX-3 is a Z.ai video generation model with improved image quality, stability and physical realism.

## Key facts

- Model author: Z.ai
- Price: $0.20 per video
- Input modalities: image, text, video
- Output modalities: video
- Released: 2025-07-15
- Model IDs: `z-ai/cogvideox-3`
- Model page: https://www.realrelay.ai/model/z-ai/cogvideox-3

## Overview

CogVideoX-3 is a video generation model from Z.ai for creating video clips. Z.ai documents significant improvements in image quality, stability and physical realism simulation, along with frame generation capabilities that improve image stability and clarity, including start and end frame synthesis.

It accepts text, image and video input and returns video output. It returns video in multiple resolutions. It was released on July 15, 2025.

## Capabilities

CogVideoX-3 takes text, image and video as input and produces video as output. Z.ai documents frame generation capabilities that improve image stability and clarity, including start and end frame synthesis.

## Pricing

CogVideoX-3 is billed at $0.20 per video.

CogVideoX-3 is available through RealRelay's OpenAI-compatible API.

## Use cases

Use CogVideoX-3 to turn a text prompt or a still image into a video clip, for example product teasers or social posts, where image stability and clarity decide whether the footage is usable.

Start and end frame synthesis lets you supply the first and last image of a clip and have the model generate the motion between them, which suits storyboard-style previews and transitions.

## FAQ

### What is CogVideoX-3?

CogVideoX-3 is a Z.ai video generation model with improved image quality, stability and physical realism.

### How much does CogVideoX-3 cost?

CogVideoX-3 is billed at $0.20 per video.

### What inputs and outputs does CogVideoX-3 support?

CogVideoX-3 accepts text, image and video input and returns video output.

### When was CogVideoX-3 released?

CogVideoX-3 was released on July 15, 2025.

### How do I call CogVideoX-3 via the API?

Send requests to RealRelay's OpenAI-compatible API and use the model ID z-ai/cogvideox-3.