ShimmerPicGPT Image 2.5 Sunburst vs Flare
Same prompt, both models, real output. OpenAI ships GPT Image 2.5 as two models: Flare, the fast default, and Sunburst, the precision model with longer generation times. Here is what that difference actually looks like.
How we ran this
Each prompt comes from the community prompt library and was sent unchanged to both models through the same API ShimmerPic uses, one run each, at 1:1, 2K resolution, Standard quality, on September 11, 2026. Nothing was cherry-picked from multiple attempts; what you see is the first result. 7 pairs are shown; one further run was excluded because its source prompt named a real athlete and third-party trademarks. One run per prompt is a sample, not a benchmark.
Illustrated regional food map (Chinese text)
A useful non-Latin text sample: both models rendered the dense Chinese labels legibly. Flare packed more dishes in with a numbered list and callouts; Sunburst laid the page out more like a map, with a legend box, wider spacing and clearer routes between towns.
Vintage 35mm film portrait
Both nailed the film look: grain, warm cast, on-camera flash falloff, cluttered bedroom. Flare's frame is cleaner and includes a date stamp; Sunburst's has heavier grain, a warmer skin tone and more background clutter — hanging plants, photos on the wall — which reads more like a found photograph.
Kawaii 3D cloud character
Almost interchangeable: both gave a squishy matte cloud with glossy eyes and pink cheeks on pure white. Flare's gradient runs slightly more saturated into lilac and blue at the base; Sunburst's is softer and the edge lighting a touch more even. On a prompt this simple the models converge.
24 hand-drawn LINE stickers of animals
Both produced a legible 24-sticker sheet with Japanese captions rendered correctly. Flare drew twenty-odd different animals — sloth, crocodile, corgi, chick — with more variety per cell; Sunburst reused a cast of six characters across poses, which is closer to how a real sticker pack is built. Choose by whether you want variety or a consistent cast.
Streetwear campaign poster
Both models spelled the brand name and tagline correctly. Flare framed a full-length model in the alley with a smaller headline and caption text; Sunburst pushed the hoodie itself into the hero position under a large metallic wordmark and added a second line of copy. Sunburst's fabric texture reads denser; Flare's scene reads more like an editorial photograph.
Miniature city hidden in hair
Flare built a grittier, more uniform block of concrete buildings with harsher light. Sunburst produced a more varied village — a church, trees, tiny figures, different roof materials — with a shallower depth of field and warmer colour. On this prompt Sunburst added noticeably more detail per element.
Fashion editorial outfit collage
Both rendered the handwritten annotations legibly and kept the same face across outfits. Flare gave seven figures with denser labels and more varied poses; Sunburst gave eight, spaced more evenly, with slightly more consistent proportions from figure to figure.
What we took from it
Across these runs Sunburst tended to add more detail per element and to produce more finished layouts; Flare tended toward simpler compositions. Both models rendered Latin and Chinese text legibly in our samples. That matches OpenAI's own framing — Flare as the fast default, Sunburst for premium work — and it means the choice is about time, not price: on ShimmerPic both models cost the same credits.
| Credits per image | 1K | 2K | 4K |
|---|---|---|---|
| Standard | 3 | 6 | 12 |
| High | 12 | 24 | 40 |
Sunburst vs Flare: common questions
Do Flare and Sunburst cost the same on ShimmerPic?
Yes. Both are charged the same credits for the same resolution and quality — from 3 credits for a 1K Standard image to 40 for 4K High, plus the same small surcharge for long prompts — so the only price you pay for Sunburst is longer generation time.
Which one should I pick?
Start on Flare while you are exploring directions, because it is faster at the same price. Switch to Sunburst for the version you intend to keep, especially for product heroes, campaign visuals and layouts with many elements, where our runs showed it adding more detail.
Can I run the same prompt on both models myself?
Yes. Open any prompt in the Studio, generate on one model, change the model in the dropdown and generate again. Both results are saved to your creations for a side-by-side look.