OpenAI GPT Image 2.5：双模型生图与官方最佳 Prompt 全拆解

model       : gpt-image-2.5-sunburst | gpt-image-2.5-flare
quality     : auto (默认) | low | medium | high | xhigh | max
size        : auto 或自定义，常见值见下
background  : auto | opaque | transparent
output_format : png | jpeg | webp
n           : 一次生成多张
partial_images : 0-3，流式输出时返回中间帧

Create a photorealistic candid photograph of an elderly sailor standing on a small fishing boat.
He has weathered skin with visible wrinkles, pores, and sun texture, and a few faded traditional sailor tattoos on his arms.
He is calmly adjusting a net while his dog sits nearby on the deck.
Shot like a 35mm film photograph, medium close-up at eye level, using a 50mm lens.
Soft coastal daylight, shallow depth of field, subtle film grain, natural color balance.
The image should feel honest and unposed, with real skin texture, worn materials, and everyday detail.
No glamorization, no heavy retouching.

Create a detailed Infographic of the functioning and flow of an automatic coffee machine like a Jura.
From bean basket, to grinding, to scale, water tank, boiler, etc.
I'd like to understand technically and visually the flow.

Give me a cool in culture ad / fashion shot for a brand called Thread.
It's a hip young street brand. The ad shows a group of friends hanging out together with the tagline "Yours to Create."
Make it feel like a polished campaign image for a youth streetwear audience: stylish, contemporary, energetic, and tasteful.
Use clean composition, strong color direction, natural poses, and premium fashion photography cues.
Render the tagline exactly once, clearly and legibly, integrated into the ad layout.
No extra text, no watermarks, no unrelated logos.

Create an original, non-infringing logo for a company called Field & Flour, a local bakery.
The logo should feel warm, simple, and timeless. Use clean, vector-like shapes, a strong silhouette, and balanced negative space.
Favor simplicity over detail so it reads clearly at small and large sizes. Flat design, minimal strokes, no gradients unless essential.
Fully transparent background. Deliver a single centered logo with generous padding, clean alpha edges, and no solid backdrop, scenery, checkerboard, or watermark.

Create a realistic mobile app UI mockup for a local farmers market.
Show today's market with a simple header, a short list of vendors with small photos and categories, a small "Today's specials" section, and basic information for location and hours.
Design it to be practical, and easy to use. White background, subtle natural accent colors, clear typography, and minimal decoration.
It should look like a real, well-designed, beautiful app for a small local market.
Place the UI mockup in an iPhone frame.

Create a simple biology diagram titled "Cellular Respiration at a Glance" for high school students.
Show how glucose turns into energy inside a cell. Include glycolysis, the Krebs cycle, and the electron transport chain.
Use arrows to connect the steps, and label the main molecules: glucose, pyruvate, ATP, NADH, FADH2, CO2, O2, and H2O.
Make it look like a clean classroom handout or slide, with a white background, simple icons, clear labels, and easy-to-read text.
Avoid tiny text, extra decoration, or anything that makes the diagram hard to understand.

Create a short vertical comic-style reel with 4 panels.
Panel 1: The owner leaves through the front door. The pet is framed in the window behind them, small against the glass, eyes wide, paws pressed high, the house suddenly quiet.
Panel 2: The door clicks shut. Silence breaks. The pet slowly turns toward the empty house, posture shifting, eyes sharp with possibility.
Panel 3: The house transformed. The pet sprawls across the couch like it owns the place, crumbs nearby, sunlight cutting across the room like a spotlight.
Panel 4: The door opens. The pet is seated perfectly by the entrance, alert and composed, as if nothing happened.

Edit the image to dress the woman using the provided clothing images.
Do not change her face, facial features, skin tone, body shape, pose, or identity in any way.
Preserve her exact likeness, expression, hairstyle, and proportions.
Replace only the clothing, fitting the garments naturally to her existing pose and body geometry with realistic fabric behavior.
Match lighting, shadows, and color temperature to the original photo so the outfit integrates photorealistically, without looking pasted on.
Do not change the background, camera angle, framing, or image quality, and do not add accessories, text, logos, or watermarks.

Place the dog from the second image into the setting of image 1,
right next to the woman, use the same style of lighting, composition and background.
Do not change anything else.

Extract the product from the input image and isolate it on a fully transparent background.
Output: centered product, crisp silhouette, no halos/fringing.
Preserve product geometry and label legibility exactly.
Add only light polishing. Do not add a solid backdrop, checkerboard, scenery, or shadow.
Do not restyle the product; remove the background and preserve clean alpha transparency.

Turn this drawing into a photorealistic image.
Preserve the exact layout, proportions, and perspective.
Choose realistic materials and lighting consistent with the sketch intent.
Do not add new elements or text.

In this room photo, replace ONLY the white chairs with chairs made of wood.
Preserve camera angle, room lighting, floor shadows, and surrounding objects.
Keep all other aspects of the image unchanged.
Photorealistic contact shadows and fabric texture.

from openai import OpenAI
client = OpenAI()

# 第一轮：生成
response = client.responses.create(
    model="gpt-6-astra",
    input="Generate an image of a shampoo billboard on a highway at sunset. Text exactly: 'Fresh and clean'",
    tools=[{"type": "image_generation", "model": "gpt-image-2.5-sunburst"}],
)

# 第二轮：基于上一轮结果继续编辑
follow_up = client.responses.create(
    model="gpt-6-astra",
    previous_response_id=response.id,
    input="Make it look like a winter evening with snowfall.",
    tools=[{"type": "image_generation", "model": "gpt-image-2.5-sunburst"}],
)

Continue the children's book story using the same character.

Scene:
The same young forest hero is gently helping a frightened squirrel
out of a fallen tree after a winter storm.

Character Consistency:
- Same green hooded tunic
- Same facial features, proportions, and color palette
- Same gentle, heroic personality

Style:
Children's book watercolor illustration,
soft lighting, snowy forest environment,
warm and comforting mood.

Constraints:
- Do not redesign the character
- No text
- No watermarks

from openai import OpenAI
import base64

client = OpenAI()
result = client.images.generate(
    model="gpt-image-2.5-sunburst",
    prompt="A photorealistic product shot of a ceramic mug on marble",
    size="1024x1024",
    quality="medium",
)
with open("mug.png", "wb") as f:
    f.write(base64.b64decode(result.data[0].b64_json))

result = client.images.edit(
    model="gpt-image-2.5-sunburst",
    image=open("original.png", "rb"),
    prompt="Remove the flower from the man's hand. Do not change anything else.",
    size="1024x1536",
    quality="medium",
)

stream = client.images.generate(
    model="gpt-image-2.5-sunburst",
    prompt="A river made of white owl feathers in a winter landscape",
    stream=True,
    partial_images=2,
)
for event in stream:
    if event.type == "image_generation.partial_image":
        # 处理中间帧
        save(event.partial_image_index, event.b64_json)