父の日 書斎セット

# 🖼️ 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 Japanese A4 vertical poster (3:4) advertisement for Father's Day. Scene: an elegant private study room with a premium 匠大塚 walnut executive desk, a leather high-back chair, a wall of leather-bound books, a single banker's lamp with green shade casting warm light, a fountain pen and leather notebook on the desk, slight cigar smoke ambience, deep moody lighting. A man in his 50s (Japanese) sitting in profile, reading a book contemplatively. Top text in large Japanese serif: "父の日に、本物の書斎を。" (white). Subtitle below: "Father's Day Special Collection" (smaller, gold). Mid-section text: "選び抜かれた一脚を、感謝の気持ちと共に。" (smaller). Bottom text: "匠大塚 父の日フェア 6月15日(日)まで" (small, white). Logo "匠大塚" in upper-right corner. Style: cinematic, masculine, premium. No watermarks, no English other than specified.
```