SonnaLabs puts the leading image models in one studio, so you can try the same prompt on several of them. This guide covers the models from Google, OpenAI, Black Forest Labs and xAI. A second guide covers Seedream, Qwen, Wan and Topaz.
Google: Nano Banana
- Nano Banana 2 has broad world knowledge, precise text and very fast generation.
- Nano Banana Pro adds studio-grade control, legible text and sharp character consistency.
OpenAI: GPT Image
- GPT Image 2 renders sharp text, understands multilingual prompts and delivers photorealistic detail up to 4K.
- GPT Image 2.5 Sunburst gives sharper visual quality and stronger fidelity to reference images, up to 4K.
- GPT Image 2.5 Flare goes for dynamic lighting and contrast and rich textures, up to 4K.
Black Forest Labs: FLUX
- FLUX.2 Pro is known for realistic lighting, spatial composition and character continuity.
- FLUX 1 Kontext Pro generates and edits images with tight scene cohesion and style control.
- FLUX 2 Flex is for flexible, high-detail generation and editing up to 2K.
xAI: Grok Image
- Grok Image has cinematic styling and witty edits from a reference image.
- Grok Image 2 is the next generation, for cinematic text to image and intelligent multi-segment editing.
What a picture costs
Prices are per image and depend on the size you choose. They are read from the SonnaLabs catalog.
| Model | Configuration | Price in credits |
|---|---|---|
 Nano Banana 2Google | 1K | 650 / image $0.045 |
| 2K | 975 / image $0.068 | |
| 4K | 1,465 / image $0.103 | |
| Nano Banana ProGoogle | 1K | 1,465 / image $0.103 |
| 2K | 1,465 / image $0.103 | |
| 4K | 1,950 / image $0.136 | |
 GPT Image 2.5 SunburstOpenAI | 1K | 490 / image $0.034 |
| 2K | 815 / image $0.057 | |
| 4K | 1,300 / image $0.091 | |
| GPT Image 2.5 FlareOpenAI | 1K | 490 / image $0.034 |
| 2K | 815 / image $0.057 | |
| 4K | 1,300 / image $0.091 | |
| GPT Image 2OpenAI | 1K | 490 / image $0.034 |
| 2K | 815 / image $0.057 | |
| 4K | 1,300 / image $0.091 | |
 FLUX.2 ProBlack Forest Labs | 1K | 405 / image $0.028 |
| 2K | 570 / image $0.040 | |
| FLUX 1 Kontext ProBlack Forest Labs | Standard | 405 / image $0.028 |
| FLUX 2 FlexBlack Forest Labs | 1K | 1,140 / image $0.080 |
| 2K | 1,950 / image $0.136 | |
 Grok ImagexAI | Standard | 325 / image $0.023 |
| Grok Image 2xAI | Standard | 325 / image $0.023 |
Prices are in credits; the dollar amounts are estimates. The current prices are always on the models page.
How to choose
- Text in the picture (posters, labels, signs): start with Nano Banana, GPT Image or FLUX.2 Pro.
- Editing a picture you already have: FLUX 1 Kontext Pro and the Grok models take a reference image, and GPT Image 2.5 Sunburst is built for fidelity to references.
- Lowest price for a first try: the two Grok models cost the fewest credits of this group, then FLUX.2 Pro and FLUX 1 Kontext Pro; the models in the second guide go lower still.
- Largest size: Nano Banana 2, Nano Banana Pro and the GPT Image models go up to 4K.
Image generation needs a paid plan or credit packs; see how credits work. The image page lets you filter the models by what you need.