If you’ve dabbled in AI image generation, you’ve likely tried AI image generators like Grok on X, ChatGPT, DALL·E 3, or Online Convert’s AI Creator Studio. Each delivers nice visuals, but their default resolutions, aspect ratios, and file formats vary. Understanding these differences can help you create sharper, platform-ready images—whether for social media posts, client projects, or high-quality prints.
Here’s what you need to know:
Grok (xAI’s Image Model)
- Default Output: Generates images at 1024 x 768 pixels in JPEG format, perfect for a 4:3 aspect ratio.
- Best For: Portraits, product shots, or visuals needing a classic rectangular frame.
- Tip: Need a widescreen image? Request a custom aspect ratio like 16:9, and Grok will generate accordingly.
ChatGPT (GPT‑4o) & DALL·E‑3
- Default Output: ChatGPT, powered by GPT-4o, generates JPEG images, while DALL·E 3 outputs WEBP.
- When using DALL·E 3 within ChatGPT and specifying image sizes by aspect ratios, you can use the following aspect ratio labels:
- 1024×1024: 1:1 aspect ratio (square image)
- 1792×1024: 16:9 aspect ratio (wide image)
- 1024×1792: 9:16 aspect ratio (tall image)
- Best For: Versatile projects needing square, widescreen, or vertical formats.
Online Convert – AI Creator Studio
- Default Output: Online Convert’s AI Creator Studio, a user-friendly platform for AI art, generates square images at 1024 x 1024 pixels in JPEG format.
- Features: Batch-create up to 16 images at once and choose from preset aspect ratios like 16:9, 9:16, 4:3, 4:5, or 3:2.
- Best For: Bulk image creation for social media campaigns or diverse project needs.
- Tip: Try 4:5 for Pinterest pins or 3:2 for blog graphics to match your platform’s vibe. Check Online Convert’s blog for more details about its AI image generator.
| Tool | Default Output | Best For |
|---|---|---|
| Grok (xAI’s Image Model) | 1024 × 768 pixels, JPEG, 4:3 aspect ratio | Portraits, product shots |
| ChatGPT (GPT-4o) & DALL·E 3 | GPT-4o: JPEG. DALL·E 3: WEBP (1:1 – 1024×1024, 16:9 – 1792×1024, 9:16 – 1024×1792) | Versatile formats (social media, video) |
| Online Convert – AI Creator Studio | 1024 × 1024 pixels, JPEG | Bulk image creation |
Why These Resolutions Matter?
- Optimized for Displays: Default sizes like 1024 x 1024 or 1792 x 1024 align with common screen ratios (e.g., 1:1, 16:9), ensuring crisp visuals on devices.
- Efficient Processing: Resolutions in multiples of 128 (e.g., 1024, 1792) are optimized for GPU processing, balancing quality and speed.
- Consistency: Fixed resolutions streamline performance across platforms, making it easier to predict output quality.
💡 Useful Tips
- Match the Platform: Choose 1:1 for Instagram posts, 16:9 for YouTube thumbnails, or 9:16 for Stories and TikTok videos.
- Check File Formats: JPEG (Grok, ChatGPT, AI Creator Studio) and WEBP (DALL·E 3) are web-optimized and widely supported. Need a different format? Use Online Convert to switch to PNG, GIF, SVG, or PDF.
- Upscale Smartly: For print or high-res displays, upscale AI images to maintain quality beyond default resolutions.
- Experiment Freely: Try generating a 16:9 banner for your next blog post or a 9:16 video background for TikTok—play with each tool to find your favorite!
In Summary
The right AI image generator makes all the difference. By leveraging default resolutions (like 1024 x 1024 or 1792 x 1024) and file formats (JPEG or WEBP), you can create stunning, platform-ready images.
Experiment with custom ratios, upscale when needed, and convert formats to fit your project.
Ready to bring your ideas to life? Pick a tool, tweak your settings, and start creating!