春の新生活ソファ Instagram投稿

# 🖼️ GPT-image-2 (OpenAI API) — 画像生成 使い方ガイド

## TOOL
**GPT-image-2** (OpenAI API)

## エンドポイント / モデル
- `POST https://api.openai.com/v1/images/generations`
- `model: "gpt-image-2"`
- 認証: OpenAI API キー (`Authorization: Bearer ...`)

## 主要パラメータ

| パラメータ | 値の例 |
|---|---|
| `size` | `"1024x1024"` (正方形 / SNS) / `"1024x1536"` (3:4 縦長 / マイソク) / `"1536x1024"` (16:9 / LP ヒーロー) |
| `quality` | `"medium"` (LP・チラシ標準) / `"high"` (印刷品質) |
| `response_format` | `"b64_json"` を推奨 (取得後に WebP/PNG に変換) |
| `n` | 通常 1 |

## 料金 (参考)
- `medium` 1024x1024 ≈ $0.053/枚
- `medium` 1024x1536 ≈ $0.080/枚

## 実投入するプロンプト本文

```text
A premium Japanese furniture advertisement image for Instagram (vertical 4:5 format). Scene: a beautiful living room with a luxurious beige fabric sofa from 匠大塚 (Takumi Otsuka), warm spring afternoon sunlight streaming through large windows, cherry blossom petals visible outside, a young Japanese mother and her child sitting cozy together, soft pastel pink and cream tones throughout. Composition: editorial fashion magazine quality, shallow depth of field, lifestyle photography. Top-left corner: elegant Japanese text "春の模様替えに、" (mid-size, refined serif font in dark navy). Below: "家族の時間を。" (larger, same font). Right corner: small "匠大塚" logo in elegant kanji. Bottom-right: small text "TAKUMI OTSUKA SPRING FAIR 2026". Style: high-end Japanese department store aesthetic, refined, premium, warm. No watermarks, no logos other than specified, no English text other than specified.
```