Side by side
| GPT Image 1.5 | Luma Uni-1 | |
|---|---|---|
| Brand | OpenAI | Luma AI |
| Type | Image model | Image model |
| Price per image | 13 credits · €0,06–€0,07 1K image at standard quality | 13 credits · €0,06–€0,07 image at 1K |
| 10 images | 130 credits · €0,56–€0,72 | 130 credits · €0,56–€0,72 |
| 100 images | 1,300 credits · €5,60–€7,21 | 1,300 credits · €5,60–€7,21 |
| Max resolution | 1K | 1K |
| Best for | Prompt-faithful images and quick edits | General image generation |
| Model page | GPT Image 1.5 | Luma Uni-1 |
Which should you choose?
Choose GPT Image 1.5 if
- your work is mostly: prompt-faithful images and quick edits
Choose Luma Uni-1 if
- your work is mostly: general image generation
Still unsure? Run one identical prompt through both. In Vyndexo that is two generations from the same screen and the same credit balance.
GPT Image 1.5 price table
| Model | Size | Low | Standard | High | Extra High | Max |
|---|---|---|---|---|---|---|
| GPT Image 1.5 | 1K 1024 × 1024 | 4 | 13 | 44 | — | — |
Luma Uni-1 price table
| Model | Small 768 px | 1K 1024 px | 1.5K 1536 px | 2K 2048 px | 3K 3072 px | 4K 4096 px |
|---|---|---|---|---|---|---|
| Luma Uni-1 | — | 13 | — | — | — | — |
Use either without a subscription
Both models are pay per use in Vyndexo: credit packs run from €4.99 for 900 credits to €999.99 for 230,000 credits, the € ranges on this page use the most and least expensive pack. See pricing, or the model pages for GPT Image 1.5 and Luma Uni-1.
Frequently asked questions
- Which is cheaper, GPT Image 1.5 or Luma Uni-1?
- Both cost 13 Tools credits per 1K image at standard quality (about €0,06–€0,07), so the choice comes down to output rather than price. Prices are the live Vyndexo table and depend only on which credit pack you buy.
- Which gives better quality, GPT Image 1.5 or Luma Uni-1?
- Both top out at 1K. Quality also depends on the job: GPT Image 1.5 is best for prompt-faithful images and quick edits, Luma Uni-1 for general image generation. The fastest way to decide is to run the same prompt through both, which Vyndexo lets you do from one account.
- Can I use both GPT Image 1.5 and Luma Uni-1 in Vyndexo?
- Yes. Both run inside the same Vyndexo workspace with one credit balance, so you can switch per generation. You do not need a OpenAI or Luma AI account or subscription.
- Do credits expire if I only use GPT Image 1.5 occasionally?
- No. Tools credits never expire, there is no monthly fee, and failed generations are not charged.