GPT Image 1は精度の高いテキストレンダリングでフォトリアルな画像を生成。編集、スタイル転写も対応。透かしなし。
GPT Image 1はOpenAIのGPT-4oマルチモーダルアーキテクチャ上に構築されており、GPT-4がテキストを考えるのと同じ方法で画像を「考え」ます。これは言語モデルに取り付けられた独立した画像モデルではなく、同一のニューラルネットワーク内で視覚的な理解と生成が行われる統合システムです。このアーキテクチャ上の決定が、GPT Image 1が競合する画像モデルよりも複雑な指示に忠実に従える理由です。
テキストレンダリングの突破口こそ、GPT Image 1の存在意義となる機能です。これまでのモデル — DALL-E 3、Midjourney、Stable Diffusion、Flux — はすべて画像内に読めるテキストを配置することに苦労していました。GPT Image 1は正確なスペルと適切なフォーマットのテキストを安定して生成でき、これまでAI画像生成では不可能だったユースケースを切り開きます。
20 credits per image
At 20 credits per image (~$0.20), GPT Image 1 is the mid-range option among image models. It's 4x the cost of Seedream (5 credits) and 2x Flux (10 credits), but the text rendering and instruction-following capabilities justify the premium for marketing and design work. Compared to a ChatGPT Plus subscription ($20/month with limited image generations), pay-per-image is more cost-effective for most users.
GPT Image 1 is the undisputed best choice when your image needs readable text — posters, marketing banners, memes, infographics, social media quote cards, product packaging mockups. No other AI image model renders text this accurately and consistently. It's also the strongest at following complex, multi-part instructions ('put X in the top-left, Y in the center, with Z as background'). For image editing workflows — changing backgrounds, removing objects, adding elements — GPT Image handles natural language editing commands better than alternatives.
If you need speed above all, Flux Pro (~5 seconds) is 2–4x faster. If you need resolution above 1024px for print or large displays, Flux supports up to 2048px. For character consistency across a series of images (same person in different scenes), Flux Kontext is purpose-built for that. For portraits and Asian aesthetic content at the lowest cost, Seedream at 5 credits/image is 4x cheaper. And GPT Image's artistic aesthetic, while good, doesn't match the distinctive visual quality that Flux is known for.
| 指標 | gpt-image | flux | seedream |
|---|---|---|---|
| Text Rendering | Multi-line, styled | Single-line | Unreliable |
| Image Editing | Yes (upload + instruct) | Yes (Kontext) | No |
| Photorealism | 1024×1024 | Up to 2048px | 1024×1024 |
| Speed | 10-20s | 5-10s | 5-15s |
| Cost per image | 5 credits | 3-5 credits | 3 credits |
| Style Transfer | Yes (upload ref) | Yes (Kontext ref) | No |
| Max Resolution | 1024×1024 | 2048×2048 | 1024×1024 |
When you want text in the image, write it exactly as you want it to appear. GPT Image renders text literally — use quotes for emphasis.
GPT Image understands spatial instructions. Describe where elements should be: 'text at the top', 'product centered', 'logo in bottom right corner'.
Generate a base image first, then upload it back and describe specific changes. This iterative approach gives much better results than trying to get everything perfect in one prompt.
Black Forest Labs' Flux Kontext generates stunning images in seconds. Pro for speed (~5s), Max for quality. With built-in character consistency and Kontext image editing.
The most affordable AI photo generator for portraits and commercial imagery. $0.05 per image, 5-second generation, optimized for Asian aesthetics and e-commerce content.
