Choose sizes and resolutions
Size is not one universal parameter across providers. Find the selected model first, then use its actual supported range.
Quick choices
| Use case | Recommended starting point |
|---|---|
| General square image | Kolors or Agnes at 1024x1024 |
| Portrait poster | Kolors at 960x1280 or 768x1024 |
| Mobile portrait | Kolors at 720x1280 |
| High-resolution landscape | Agnes at 1536x1024 or tested 2048x1536 |
| Standard video | Agnes Video at 1152x768, 121 frames, 24 fps |
Kolors fixed sizes
| Size | Use |
|---|---|
1024x1024 | Square default |
960x1280 | Portrait covers and posters |
768x1024 | Lighter portrait image |
720x1440 | Tall portrait |
720x1280 | 9:16 mobile portrait |
Other sizes may fall back to 1024x1024.
ModelScope
Qwen Image, FLUX Krea, Z-Image and Z-Image Turbo do not share one parameter contract. Gateway does not force a common size field for ModelScope models.
Agnes Image
| Recommendation | Size |
|---|---|
| General image | 1024x1024 or 1024x768 |
| High-resolution landscape | Tested at 2048x1536 |
| Not a safe default | 2048x2048 is more likely to time out |
OpenAI-compatible Image
Start with 1024x1024, 1536x1024 or 1024x1536. A third-party compatible endpoint may not support the same arbitrary sizes as an official model.
Agnes Video
| Parameter | Range | Default |
|---|---|---|
| width | 256–2048 | 1152 |
| height | 256–1536 | 768 |
| num_frames | 9–441 and 8n+1 | 121 |
| frame_rate | 1–60 | 24 |
Validate the route with the default resolution and 81 or 121 frames before increasing cost.