# CogView4 AI Image Generator

> Z.ai’s open text-to-image model for descriptive prompts, stylised scenes and classic diffusion tuning.

Canonical URL: https://allimageai.com/models/cogview-4/

Website: All Image AI

Language: English

CogView4 is Z.ai’s open text-to-image model for long descriptive prompts. The hosted operation exposes custom dimensions, negative prompts, CFG guidance, step count and deterministic seeds for traditional diffusion-style control.

## Model details

- Developer: Z.ai
- Status on All Image AI: Active
- Last verified: 2026-08-25
- Maximum output: 2K
- Modes: Text to Image, Typography
- Reference images: not supported
- Resolutions: 1K, 2K
- Aspect ratios: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3

## Best for

- Long descriptive prompts
- Stylised illustration
- Controlled composition tests
- Open-model workflows

## How to use

1. Use a complete descriptive prompt.
2. Add a concise negative prompt.
3. Compare seeds at 1K.
4. Render the selected composition at 2K if needed.

## Settings explained

### Steps

50 is the documented default; lower it only when faster drafts are more important than finish.

### Negative Prompt

Remove unwanted objects, blur or watermarks without changing the main brief.

## Prompt examples

### Detailed vehicle scene

> Cherry-red sports coupe parked on a coastal road at midday, polished body reflecting the blue sea, black racing rims, low camera angle, realistic commercial photography

### Illustration

> Layered paper-cut illustration of a mountain railway in winter, cobalt shadows, warm carriage windows, intricate handcrafted edges

## Limitations

- Text-to-image only
- The 50-step default is slower than distilled models
- The hosted per-megapixel price makes 2K a final-only tier

## Pricing and credits

Credits for one image at default quality and mode. Resolution, quality, reference inputs, edit mode and output count can change the total. Check the Generate button before submitting.

| Resolution | Credits / image |
| --- | --- |
| 1K | 8 |
| 2K | 30 |

Failed generations cost 0 credits. Catalog availability does not guarantee runtime availability; the workspace reports whether the selected model can run.

[Credit plans](https://allimageai.com/pricing.md)

## Test results

Testing in progress. No verified benchmark scores have been published for this model.

## Commercial use and image handling

Commercial use is subject to the CogView model licence and the selected service terms.

Uploads are processed by the configured inference service. You can delete a generation from your history.

## Frequently asked questions

### Who develops CogView4?

The official repository is maintained by Z.ai and hosts the CogView model family.

### Does a longer prompt help?

The model documentation specifically recommends detailed prompts for better results.

## Release history and sources

March 4, 2025 — Open weights released

This date applies to the event shown. Later API access, weights and availability on All Image AI may have different dates.

- [github.com](https://github.com/zai-org/CogView4)

[Event evidence on the timeline](https://allimageai.com/timeline/#event-cogview-4)