4:5 aspect ratio (4:5)
4:5 is the tallest ratio Instagram shows in full without cropping, making it the standard for portrait social content.
Standard pixel sizes
| Size string | Resolution | Megapixels |
|---|---|---|
| 1024×1280 | 1024 × 1280 px | 1.31 MP |
| 1638×2048 | 1638 × 2048 px | 3.35 MP |
Need a custom fit? The aspect ratio calculator fits this ratio into any megapixel budget.
What to use 4:5 for
Instagram feed posts and portrait social images that must avoid cropping.
Models that support 4:5
4:5 FAQ
What resolution is 4:5?
4:5 is a ratio, not a fixed resolution — any pixel dimensions where width ÷ height = 4 ÷ 5 is "4:5". Common generation sizes include 1024×1280, 1638×2048, listed in the table above.
Which AI models generate 4:5 images?
Most image generation models on our gateway cover the common ratios; check each model's spec sheet for the full list.
Which AI video models output 4:5?
HappyHorse 1.1, HappyHorse 1.0 generate 4:5 video. Video on our gateway is limited to 16:9 and 9:16.
How much does a 4:5 generation cost?
Aspect ratio doesn't affect price — image models bill per generated image (from $0.025) and video models per clip. See the pricing page for live rates.