GPT Image 2.5 Prompting Basics for Better Image Generation

Start With the Result You Need

A useful image prompt begins with the finished result, not a long list of disconnected adjectives. State the subject, setting, visual medium, composition, lighting, and intended use in a clear order.

For example, instead of asking for “a beautiful product photo,” describe “a studio product photograph of a ceramic coffee cup on pale stone, photographed at eye level with soft window light, generous negative space on the right, prepared for a wide website banner.”

This structure gives the generator both creative direction and practical layout constraints.

Choose Sunburst or Flare

GPT Image 2.5 Sunburst is the default model in the generator. Choose it when precise instruction following, reference-image editing, or a carefully controlled final composition matters most.

Choose GPT Image 2.5 Flare when you want to explore ideas quickly. It is useful for early concepts, visual variations, and everyday image generation where speed matters more than maximum refinement.

Build a Clear Generation Prompt

Use this compact structure for a new image:

1. Subject: Identify the main object, person, or scene.
2. Environment: Describe where the subject appears and what surrounds it.
3. Medium and style: Specify photography, illustration, 3D rendering, collage, or another visual medium.
4. Composition: Define the camera angle, crop, focal point, and negative space.
5. Lighting and color: Name the light direction, contrast, and a small color palette.
6. Purpose: Mention whether the image is for a banner, product card, poster, social post, or another format.

Avoid contradictory directions such as requesting both flat lighting and dramatic hard shadows. A short, consistent brief is usually easier to interpret than a long prompt containing competing styles.

Give Editing Instructions in Steps

When editing a reference image, separate what must stay unchanged from what should change. A practical edit request can follow this pattern:

• Keep the subject, pose, camera angle, and product proportions unchanged.
• Replace the background with a warm modern studio.
• Change the lighting to a soft source from the upper left.
• Remove distracting labels and reflections.
• Preserve realistic materials and natural contact shadows.

This makes the editing boundary explicit and reduces accidental changes to important details.

Match the Aspect Ratio to the Destination

Select the destination format before generating. Wide ratios suit website heroes and presentation covers, square images fit many catalog and social layouts, and portrait ratios work well for posters and mobile-first content.

Resolution should follow the same principle. Use a lower resolution while testing prompt directions, then move to a higher setting for the version you intend to publish or refine.

Iterate One Variable at a Time

If the first result is close, do not rewrite the entire prompt. Change one dimension—composition, lighting, palette, material, or detail level—while keeping the rest stable. This makes each iteration easier to evaluate and helps you identify which instruction produced the improvement.

Save the strongest prompt and reference image together. They form a reusable creative brief for future variations and edits.