curl --request POST "https://gptproto.com/api/v3/openai/gpt-image-2/image-edit" \
--header "Authorization: Bearer $GPTPROTO_API_KEY" \
--header "Content-Type: application/json" \
--data '{
"images": [],
"prompt": "A tiny origami fox sailing a teacup across a moonlit puddle",
"n": 1,
"quality": "auto",
"size": "auto",
"enable_sync_mode": "false",
"response_format": "url"
}'1回のサンプル費用から始め、テスト予算を選びます。GPTProto 料金は表示価格より 20% お得です。
| シナリオ | OpenAI リスト | OpenRouter | GPTProto | 月間の節約 |
|---|---|---|---|---|
| クイックテストとプロトタイプ100 枚 / 月 | $3.26 | $3.44 | $2.61 | −$0.65≈ $7.82 / 年 |
| 商品・EC 写真1,000 枚 / 月 | $32.58 | $34.37 | $26.06 | −$6.52≈ $78.19 / 年 |
| 広告 / マーケ素材2,500 枚 / 月 | $81.45 | $85.93 | $65.16 | −$16.29≈ $195.48 / 年 |
| SNS コンテンツ10,000 枚 / 月 | $325.80 | $343.72 | $260.64 | −$65.16≈ $781.92 / 年 |
OpenAI · $6.4/M input · $24/M output
GPT Image 2とは？
gpt-image-2 is OpenAI's image generation and editing model, released April 21, 2026 as the successor to gpt-image-1 (April 2025) and gpt-image-1.5 (December 2025). It is natively multimodal — image generation is part of the core model rather than a diffusion model bolted onto a language model — which is why it follows long, multi-part prompts and renders readable in-image text more reliably than DALL-E-era generators.
Two things set the model apart at the API level. First, an agentic "thinking" pass: for complex prompts it plans composition and reasons through constraints before generating, which lifts success rates on infographics, multi-panel layouts, and text-heavy marketing assets. Second, an editing endpoint that accepts mask images for precise inpainting and outpainting, plus up to 16 reference images per call for identity and style consistency. Output is PNG at up to 2K native resolution, with neutral color that fixes the warm cast in gpt-image-1.5.
On GPTProto you call the same gpt-image-2 model ID through the standard OpenAI-compatible request shape — no separate OpenAI account, no organization verification step, and one balance that also covers Nano Banana Pro, Seedream, Flux, and 200+ other models.
GPT Image 2 Specifications
| Spec | GPT Image 2 |
|---|---|
| Model ID | gpt-image-2 |
| Released | April 21, 2026 |
| Type | Text-to-image + image editing (inpaint / outpaint) |
| Output format | PNG (raster) |
| Max resolution | Native 2K (2048px); high-res variants up to ~4K |
| In-image text | Latin + CJK (Chinese / Japanese / Korean), dense layouts |
| Reasoning | Agentic "thinking mode" (plans before rendering) |
| Reference images | Up to 16 per call |
| Editing | Mask-based inpaint / outpaint; unedited pixels preserved |
| Input modality | Text (+ reference images) |
| OpenAI list price | $8 / $30 per 1M tokens (input / output) |
| GPTProto price | $6.4 / $24 per 1M tokens (20% under list) |
| Access | One GPTProto key, no OpenAI org verification |
GPT Image 2 vs Nano Banana Pro (and gpt-image-1.5)
| GPT Image 2 | Nano Banana Pro | GPT Image 1.5 | |
|---|---|---|---|
| Model ID | gpt-image-2 |
gemini-3-pro-image-preview |
gpt-image-1.5 |
| Vendor | OpenAI | OpenAI | |
| Released | Apr 2026 | Nov 2025 | Dec 2025 |
| Max resolution | 2K native (~4K variants ) | up to 4K (4096px) | 2K |
| In-image text | Latin + CJK | multilingual, long passages | improved vs gpt-image-1 |
| Reasoning | agentic thinking | Gemini 3 reasoning + Search grounding | none |
| Reference inputs | up to 16 images | multi-image, ~5-subject identity | fewer |
| OpenAI/Google list | $8 / $30 per 1M | $2 / $12 per 1M | $8 / $32 per 1M |
| GPTProto price | $6.4 / $24 per 1M | $ 0.0804/ per time |
$ 5.6 / $ 22.4 per 1M |
| On GPTProto | ✓ | ✓ | ✓ |
Which to pick (honest): Nano Banana Pro has the lower token rate, native 4K, and Search-grounded generation — reach for it when cost, 4K infographics, or real-world-grounded visuals matter most. GPT Image 2 leads on agentic layout planning, up to 16 reference images, and tight drop-in compatibility with the OpenAI SDK — reach for it for reference-heavy product/packaging work already wired to OpenAI. Because both run on one GPTProto balance, you can benchmark them against your own prompts without opening a second account.
Switching from the Official OpenAI API
If you already call gpt-image-2 on OpenAI, moving to GPTProto is a base-URL swap — the model ID and request shape stay the same:
- Keep
model: "gpt-image-2"and your existingimages.generate/ edit request body. - Point the client at GPTProto's OpenAI-compatible base URL
https://gptproto.com/v1and use your GPTProto key. - Skip OpenAI's Organization Verification gate that fronts the GPT Image family, and skip a second billing account — the same balance covers 200+ models.
GPT Image 2 API: High-Detail Generation and Vision Skills
Exploring GPT Image 2 and other models reveals a significant shift in how AI handles visual complexity and linguistic integration within pixels. GPT Image 2 — the latest evolution in the GPT vision series — focuses on solving the long-standing challenges of text clarity and intricate detail consistency.
GPT Image 2 Performance and Reddit Community Feedback
The reception of GPT Image 2 across developer circles and creative communities has been largely positive, specifically regarding its aesthetic output. Many early testers suggest that GPT Image 2 represents the best image model currently available for general-purpose creative tasks. According to recent GPT Image 2 community reviews, the model demonstrates a remarkable ability to generate complex, visually appealing scenes that previous versions struggled to maintain.
However, the GPT Image 2 user experience isn't without its nuances. While the quality remains high, the 'self-review loop' feature — a mechanism where the model audits its own output for errors — introduces a trade-off. This process can extend generation times significantly, sometimes reaching 11 minutes per image in high-fidelity modes. For production environments requiring high throughput, balancing GPT Image settings becomes essential to maintain efficiency.
Achieving Superior Text Rendering with GPT Image
One of the most notable improvements in GPT Image 2 involves text rendering within generated graphics. Historically, AI models produced 'gibberish' or distorted characters. GPT Image 2 handles small details and legible text with much higher precision. Whether generating UI mockups, posters, or branded content, GPT Image provides a level of clarity that reduces the need for post-generation manual editing.
GPT Image 2 excels at small detail rendering, though it remains a stochastic system. For developers, the real value lies in the GPT Image 2 API's ability to interpret complex prompts into structured, readable visual data.
GPT Image API Latency and the Self-Review Loop
When using the GPT Image 2 API, performance varies based on the active features. The self-review loop offers a layer of quality control that virtually eliminates 'six-finger' artifacts and warped anatomy. However, this precision comes at a cost of time. For rapid prototyping, many developers prefer the standard GPT 2 generation path, which bypasses the extended review phase to deliver results in seconds rather than minutes.
GPT Image 2 vs Nano Banana Pro: A Capability Comparison
The competitive landscape for vision models is heating up. GPT Image 2 often faces comparisons with upcoming models like Nano Banana Pro. While Nano Banana promises steep competition, GPT Image currently leads in architectural stability and prompt adherence. Developers evaluating these models should consider the following metrics:
| Feature Metric | GPT Image 2 | GPT Image 1.5 | Nano Banana Pro |
|---|---|---|---|
| Text Legibility | High | Moderate | Pending |
| Small Detail Focus | Superior | Average | High |
| Average Latency | Variable | Fast | Fast |
| API Stability | Stable | Stable | Experimental |
| Vision Reasoning | Advanced | Basic | Advanced |
As shown, GPT Image 2 prioritizes quality and reasoning over raw speed, making it the preferred choice for high-end creative workflows where accuracy outweighs the need for instant delivery.
Managing Hallucinations in GPT 2 Manga Translation
Specialized use cases, such as manga translation or technical diagramming, highlight certain GPT Image 2 limitations. Users have reported massive hallucinations when translating text directly within an image. In some instances, GPT Image 2 may change the original artwork significantly while attempting to modify the text. For these workflows, a multi-stage approach — using the vision API to extract text and then a separate layer for overlaying — often yields better results than direct image-to-image manipulation.
GPT Image 2 Image-to-Image Workflow Issues
Another area for optimization is the image-to-image generation feature. Current GPT Image 2 behavior sometimes results in the reference image 'shimmering' through or overlaying awkwardly rather than a clean transformation. Understanding these GPT Image 2 nuances allows developers to craft better prompts that guide the model toward cleaner transitions. For deeper technical strategies, you can read the full API documentation for the GPT Image series.
GPT Image Pricing and Stable API Access
Accessing GPT Image 2 via GPTProto eliminates the complexity of credit-based systems. We offer flexible pay-as-you-go pricing that ensures you only pay for the tokens and generations you actually use. Our infrastructure is built for stability, providing a reliable bridge to the GPT Image 2 API even during peak demand periods. Users can monitor API usage in real time to optimize their spending and performance.
Whether you are building a humorous meme generator or a professional design assistant, GPT Image 2 offers the creative depth required for modern AI applications. By joining the GPTProto referral program, you can also earn commissions while sharing these powerful vision capabilities with your network.
GPT Image 2 FAQ：知っておくべきことすべて
GPT Image 2の機能、料金、API統合に関するよくある質問への回答をご覧ください。
GPT Image 2モデルの特徴は何ですか？
GPT Image 2はテキストの描画に対応していますか？
GPT Image 2を漫画の翻訳に使用できますか？
GPT Image 2のセルフレビューループとは何ですか？
本番環境のワークロードには、GPT Image 2のどのティアが適していますか？
GPT Image 2の画像から画像への生成に関する問題に対処するには？
GPT Image 2はNano Banana Proより優れていますか？
GPT Image 2を統合する最適な方法は？
GPT Image 2の料金に上限はありますか？
GPT Image 2ではハルシネーションが発生しますか？
GPT Imageのプロンプトの精度を高めるには？
GPT Image 2のドキュメントはどこで確認できますか？
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