Mixer AI
GPT Image 2 vs GPT Image 2.5: model comparison
Both versions accept up to 16 images and support 1K, 2K and 4K in Mixer AI. GPT Image 2.5 exposes more aspect options. In a direct test, a direct test placed Image 2, Flare and Sunburst side by side, which makes it possible to separate product facts from test-specific visual differences.
Key differences
Specifications
| Spec | GPT Image 2 | GPT Image 2.5 |
|---|---|---|
| Model variants | GPT Image 2 | Flare / Sunburst |
| Generation modes | from text / photo editing | from text / photo editing |
| Input photos | up to 16 | up to 16 |
| Transparent background | Yes | Yes |
| Resolutions | 1K / 2K / 4K | 1K / 2K / 4K |
| Aspect ratios | 9:16 / 16:9 / 1:1 / auto / 4:3 / 3:4 | 9:16 / 16:9 / 1:1 / auto / 3:2 / 2:3 / 4:3 / 3:4 / 21:9 / 27:16 / 16:27 / 9:8 / 8:9 |
| Prompt limit | 20,000 characters | 20,000 characters |
| Price, 1 image · 1K | 8 coins | 8 coins |
Observations from one side-by-side test
- On a graphic poster, Image 2 already produced readable text; the reviewer saw a small clarity increase with 2.5 and another step with Sunburst.
- After stronger art direction, the reviewer again preferred Sunburst but explicitly described the differences as very small and largely a matter of preference.
- In a multi-panel scene, Sunburst looked best to the reviewer overall, yet its legs and body shapes were worse; preserving the text coincided with anatomy distortion in that result.
What repeats and what does not
The test does not support a blanket claim that 2.5 is always better. A narrower pattern is visible: some graphic-design outputs looked sharper, while the advantage was often small and did not remove local errors.
- GPT Image 2 already produced readable text in the test; 2.5 does not make typography error-proof.
- Across several images, the reviewer described the gap between the three outputs as minor.
- Anatomy and small graphic elements still need inspection on either version.
What is actually available in Mixer AI
The video used another interface. For Mixer AI, the relevant facts are the controls exposed here: both versions edit images and support 1K–4K, while GPT Image 2.5 has a wider set of aspect options. External quality modes shown in the review are not treated as Mixer AI features.
Sources
Prices, availability and specifications come from the Mixer AI catalog. This is not an independent test: try both models on the same task before choosing.
What we compare
FAQ
Does GPT Image 2.5 always produce a higher-quality image?
No. The direct test often showed a small gap, and one complex composition had visibly worse body anatomy in the Sunburst result.
Is the input-image limit different in Mixer AI?
No. Both currently accept up to 16 images. The clearer interface difference is the larger aspect-ratio set on GPT Image 2.5.