Want high-quality, commercially usable AI images? GPT Image 2 is among the strongest image models available today. This article covers model choice, parameter tradeoffs, and sizing rules—so you move fast with fewer pitfalls.
Series：(II) Prompt basics · (III) Advanced prompt techniques · (IV) Generation use cases · (V) Editing use cases · (VI) Character consistency
Why GPT Image 2?
Your model caps image quality. Per OpenAI guidance, new projects should default to gpt-image-2 because it combines:
- High-fidelity photorealism
- More stable faces and identity
- More reliable on-image text (great for infographics and charts)
- Stronger stylistic control
- Real-world knowledge you can lean on in prompts
Model overview: when to use which?
| Model | Best for |
|---|---|
| gpt-image-2 | Default for new work: high-quality generation & editing, crisp text, photorealism, identity-sensitive edits |
| gpt-image-1.5 | Transitioning older workflows |
| gpt-image-1 | Not recommended for new pipelines |
| gpt-image-1-mini | High-volume drafts/previews when cost matters most |
Upgrade path: customer-facing assets, brand work, photoreal deliveries → use gpt-image-2. Mass exploration → consider gpt-image-1-mini.
Quality: choose low / medium / high
- Speed or concurrency first: try
quality="low" - Small type, dense layouts, portraits, identity edits: compare
mediumvshigh - Judge by first-hit rate and rework cost—not a single lucky render
GPT Image 2 sizing rules (must-know)
- Longest side < 3840px
- Width & height must be multiples of 16
- Aspect ratio ≤ 3:1
- Total pixels ≤ 8,294,400 (~8.3MP), ≥ 655,360
Quick resolution cheat sheet
| Type | Size (W×H) | Typical use |
|---|---|---|
| Portrait HD | 1024×1536 | Phone posters / vertical art |
| Landscape HD | 1536×1024 | Wallpapers / wides |
| Square | 1024×1024 | Avatars / social squares |
| 2K / QHD | 2560×1440 | Mainstream desktop 2K |
| 4K / UHD | 3840×2160 | 4K experiments (use cautiously) |
Tip: stability can drop beyond 2560×1440—treat ultra sizes as experimental.
Conclusion
If you are starting a new workflow today, default to gpt-image-2, then tune quality and sizing for the task.
👉 Try GPT Image 2 in **[AI Workspace](https://app.gptimage2.hk)**—minimal setup—ship polished frames quickly.
Get started with GPT-image2