Comparisons
GPT Image 2.5 Sunburst vs Z-Image
Compare API prices and supported settings.
What 1,000 generations cost
These totals multiply the lowest published tariff. Matching billing units do not guarantee the same resolution, quality or output length. Check the selected request price before budgeting.
GPT Image 2.5 Sunburst
$10.00
$0.01 per generation
Z-Image
$10.00
$0.01 per generation
Both models cost the same per 1,000 generations, so the choice comes down to capabilities rather than price.
Side by side
| Attribute | GPT Image 2.5 Sunburst | Z-Image |
|---|---|---|
| Type | Image | Image |
| Provider | OpenAI | Alibaba |
| Starting price | $0.01 per generation | $0.01 per generation |
| 1,000 generations | $10.00 | $10.00 |
| Price options | 3 | 1 |
| Parameters | 4 | 4 |
| Capabilities |
|
|
| Details | View GPT Image 2.5 Sunburst → | View Z-Image → |
Parameters side by side
Every request field either model accepts. A dash means that model does not accept the field.
| Parameter | GPT Image 2.5 Sunburst | Z-Image |
|---|---|---|
| promptPrompt | Requiredstring | Requiredstring |
| urlsUrls | Optionalstring[] | Optionalstring[] |
| sizeSize | Optionalauto | 1:1 | 16:9 | 9:16 +12 | Optional1:1 | 4:3 | 3:4 | 16:9 +1 |
| resolutionResolution | Optional1k | 2k | 4k | — |
| enableSafetyCheckerEnable Safety Checker | — | Optionalboolean |
Frequently asked questions
Which is cheaper, GPT Image 2.5 Sunburst or Z-Image?
GPT Image 2.5 Sunburst and Z-Image start at the same price, $0.01 per generation, so the choice comes down to capabilities rather than cost. These totals multiply the lowest published tariff. Matching billing units do not guarantee the same resolution, quality or output length. Check the selected request price before budgeting.
What do GPT Image 2.5 Sunburst and Z-Image cost for 1,000 generations?
1,000 generations cost $10.00 on either model. These totals multiply the lowest published tariff. Matching billing units do not guarantee the same resolution, quality or output length. Check the selected request price before budgeting.
What can GPT Image 2.5 Sunburst do that Z-Image cannot?
Their published capability labels match. This does not establish identical output quality or behaviour; compare the accepted input values and test the same brief.
Do GPT Image 2.5 Sunburst and Z-Image take the same parameters?
They share 3 parameters. GPT Image 2.5 Sunburst also accepts resolution; Z-Image also accepts enableSafetyChecker.
Can I switch between GPT Image 2.5 Sunburst and Z-Image?
Both use the same API Stock API key and prepaid balance. Change the model field, then check the target model’s input schema, supported values and output before sending the request.
Guides
- Image generationWhich image model to use for the picture you need, prompts that produce it, batching for variants, and the API run from prompt to file URL.8 min read
- Image editingEditing photos with references instead of prompts — background swaps, product composites, style matching, and the Midjourney action chain from imagine to inpaint.8 min read
- GPT Image 2.5 — Sunburst, Flare, prompts and real examplesChoose a GPT Image model, compare Sunburst and Flare, copy four practical prompts, inspect six real renders, and generate or edit images through API Stock.9 min read