# GPT Image 2.5 Sunburst guide — prompts, text and clean layouts > How to prompt GPT Image 2.5 Sunburst on eroq: design-brief prompts, in-image text that reads, clean composition, six examples, price and render time. Published 2026-10-08 · eroq.ai — canonical: https://eroq.ai/blog/gpt-image-2-5-sunburst-guide [GPT Image 2.5 Sunburst](/models/gpt-image-2-5-sunburst) is OpenAI's flagship image model, and on eroq it is the one you pick when the picture has a job description: a headline that must be spelled right, a product that must sit in the left third, a layout that has to match the sketch on your whiteboard. It follows prompts closely, keeps composition clean, and it is the lineup's pick for sharp in-image text. This guide is for designers, marketers and anyone who writes briefs: how to prompt it, how to get lettering that reads, and where it stops being the right tool. ## The numbers - **Price:** 31 credits / image at every format, about $0.31 at the entry pack, where a credit is roughly a cent. - **Speed:** typically about 15 seconds a take (a planning estimate, not a guarantee). - **Formats:** 1:1, 3:4, 4:3, 9:16 and 16:9, each rendered natively. - **Takes:** 1 to 4 per run, billed and refunded one by one. A full run of four is 124 credits. - **Inputs:** a text prompt. On eroq there are no reference pictures and no Edit mode for this model. - **Plan:** any plan: a pay-as-you-go credit pack is enough, no subscription. - **Content:** moderated upstream by its provider. A refused prompt returns `content_blocked` and costs nothing. - **API id:** `gpt-image-2-5-sunburst` on `POST /v1/images/generations`. ## Write the prompt like a design brief Sunburst rewards the order a good brief already follows. Five parts, in this sequence: 1. **What the artifact is.** "A product photograph", "a flat-color event poster", "a mobile onboarding screen". Naming the artifact sets a hundred defaults at once: margins, framing, how much of the frame the subject takes. 2. **The subject and where it sits.** "A ceramic mug in the lower right third", "the climber small against the cliff, top left". Position words are cheap and Sunburst listens to them. 3. **The background.** Seamless paper, a blurred kitchen, a solid color. Name the color properly: "deep teal" beats "dark". 4. **The light.** One sentence is enough: "soft window light from the left, a gentle shadow falling right". 5. **The words.** The exact text in quotes, where it goes and what it is set in. Then choose the ratio in the Format control instead of describing it. "A vertical poster" plus 3:4 is redundant but harmless; "a vertical poster" rendered in 16:9 is a fight you will lose. Keep one clear idea per image. Two competing subjects split the composition. If a frame needs two products, make one the hero and give the other a job: "a smaller matching lid leaning against its base". ## Text that actually reads This is why most people open Sunburst. A few habits make the difference between a clean headline and a near-miss: - **Quote the exact words**, in the case you want: the headline "OPEN STUDIO WEEKEND" in capitals. - **Keep it short.** A headline, a tagline, a label or a button. The fewer words you ask for, the cleaner each one comes out. Body copy belongs in your layout tool, not in the render. - **Say where and how.** "Set in a bold condensed sans across the top", "a small serif caption under the photo", "centered on the label". - **Give the text a surface.** A poster, a label, a sign, a screen, a T-shirt. Words floating in a scene have nothing to anchor to. - **Check at full size, then re-roll.** There is no Edit mode on Sunburst, so a misspelled take is a re-render, not a touch-up. Rendering four takes at once is the efficient way to find the clean one. For the cross-model view, see the [guide to legible AI text](/blog/ai-text-in-images-guide) and the [Sunburst vs Flux 3 typography showdown](/blog/gpt-image-2-5-vs-flux-3-text-in-images). ## Composition you can steer Words that move the layout reliably: "centered and symmetrical", "rule of thirds, subject on the left", "generous negative space on the right for copy", "flat lay shot from directly above", "isometric view", "three-quarter view", "tight crop", "wide establishing shot". For structured layouts, describe the structure before the content: "three illustrated steps in a row, each with a numbered circle and a one-word caption". For UI mockups, list the screen elements in reading order, top to bottom, with each label quoted. ## Example prompts 1. **Event poster, 3:4.** Artifact first, one subject, two text blocks with placement and type style. > A flat-color screen-print poster for a weekend pottery market: a stack of glazed bowls in terracotta and cream at the center, a sun shape behind them, generous margins, the headline "CLAY DAYS" in a bold rounded sans at the top and "SAT–SUN · RIVER HALL" in small capitals at the bottom, warm off-white paper texture. 2. **Product hero, 4:3.** Placement plus empty space you can fill with real copy later, and only a one-word logo in the render. > A clean studio product photograph of a sage-green insulated water bottle standing on a pale stone block in the right third of the frame, soft key light from the left, a long gentle shadow, empty space on the left, the printed logo on the bottle reads "TRAILMATE" in white. 3. **App onboarding screen, 9:16.** Elements in reading order, every string quoted, a single button. > A mobile app onboarding screen for a plant-care app shown flat on a white background: a large illustration of a monstera leaf at the top, the heading "Water less. Grow more." below it, one rounded green button labeled "Get started" near the bottom, clean modern sans-serif, lots of white space. 4. **Infographic-style banner, 16:9.** The structure is stated before the content, and each label is one word. > An infographic-style banner explaining pour-over coffee: three illustrated steps in a row, a grinder, a pour-over cone and a cup, each with a numbered circle and a one-word caption, "GRIND", "BLOOM", "POUR", flat vector style, cream background, dark brown and copper palette. 5. **Desk flat lay, 1:1.** No text at all: a reminder that the layout control is worth having on its own. > An overhead flat lay of a designer's desk: a sketchbook open to pencil thumbnails, a steel ruler, three markers in coral, teal and mustard, a phone showing a color palette, everything aligned at right angles, soft daylight, calm and orderly. 6. **Shop sign, 4:3.** Lettering on a physical surface in a photographic scene. > A small bakery storefront in the morning, a hand-painted wooden sign above the window reading "BREAD & BUTTER", fresh loaves visible behind the glass, a bicycle leaning by the door, soft overcast light, documentary photograph, 35mm. ## When Sunburst is not the pick - **More atmosphere than precision:** its sibling [GPT Image 2.5 Flare](/models/gpt-image-2-5-flare) costs the same and renders bolder. [Sunburst vs Flare](/blog/gpt-image-2-5-sunburst-vs-flare) splits the difference. - **A final where every detail must hold:** [Nano Banana Pro](/models/nano-banana-pro), at 124 credits / image. - **A natural-light photograph:** [Flux 3 Image](/models/flux-3-image). - **Your real product, logo or face:** Sunburst cannot see your files. Compose the layout here, then rebuild it on [Eroq One](/models/eroq-one), which reads up to ten reference pictures. For a ready-made library, [25+ GPT Image 2.5 prompts](/blog/gpt-image-2-5-prompts) covers posters, products, layouts and UI. Or open the [image studio](/studio/image), pick Sunburst and start with two takes of the poster prompt above. ## FAQ ### How do I get GPT Image 2.5 Sunburst to spell text correctly? Put the exact words in quotes, keep them to a headline or a label, say where they sit and in what type style, and give them a surface such as a poster or a sign. Render several takes and keep the cleanest; a misspelled take is a re-render, since there is no Edit mode. ### How long does GPT Image 2.5 Sunburst take to render? Typically about 15 seconds a take. It is a planning estimate: a busy moment can add queue time, and the studio shows how long each take actually took. ### Can GPT Image 2.5 Sunburst use my logo or a photo of my product? Not on eroq: it is text-to-image only and reads no reference pictures. Describe the layout on Sunburst, then use Eroq One, which builds a shot from up to ten reference pictures, when the real logo or product has to appear. ### What aspect ratios does GPT Image 2.5 Sunburst support? Five: 1:1, 3:4, 4:3, 9:16 and 16:9, each rendered natively and at the same price. 3:4 suits posters, 9:16 suits phone screens and stories, 16:9 suits banners and slides.