--- title: AI Image Generation API | RunAPI description: Generate, edit, upscale, and remove backgrounds with image models through one API. url: https://runapi.ai/image.md canonical: https://runapi.ai/image locale: en site: RunAPI image: https://runapi.ai/assets/opengraph-f702f2b1.png alternates: en: https://runapi.ai/image zh-CN: https://runapi.ai/zh-CN/image es: https://runapi.ai/es/image ja: https://runapi.ai/ja/image de: https://runapi.ai/de/image fr: https://runapi.ai/fr/image pt-BR: https://runapi.ai/pt-BR/image ko: https://runapi.ai/ko/image it: https://runapi.ai/it/image nl: https://runapi.ai/nl/image pl: https://runapi.ai/pl/image tr: https://runapi.ai/tr/image zh-TW: https://runapi.ai/zh-TW/image zh-HK: https://runapi.ai/zh-HK/image ar: https://runapi.ai/ar/image x-default: https://runapi.ai/image --- > HTML version: https://runapi.ai/image > Site index for agents: https://runapi.ai/llms.txt Image API # AI Image Generation API Generate, edit, upscale, and remove backgrounds with Flux, Midjourney, Ideogram, GPT Image, and Imagen through one API. - [Get API Key](https://runapi.ai/login) - [Browse Models](https://runapi.ai/models.md) 57 image models - pay per image - Image models: 57 - Below official: — - Median latency: 16s ## Playground - Flux Pro 1.1: ≈ $0.05 / image - GPT Image 2: ≈ $0.02 / megapixel - Midjourney v7: ≈ $0.08 / image Prompt: Editorial product shot of a matte ceramic cup on brushed steel, single softbox, cold morning light - Size: 1024 x 1024 - Style: photographic - Batch: 4 images - Mode: text_to_image Est. cost: ≈ $0.05 / image Examples ## Image gallery ### Portrait ![Portrait](https://cdn.runapi.ai/public/homepage/media-showcase/b331927cb3fcf76a-runapi.ai-flux-pro.jpg) ### Macaw ![Macaw](https://cdn.runapi.ai/public/homepage/media-showcase/b1ff27fb20bffd98-runapi.ai-midjourney-v7.jpg) ## Everything the image endpoint can do - **Text to Image** - One prompt, one call. Size, style, and batch count are plain parameters on the same endpoint. - **Image Editing** - Instruction-based edits on an existing image - change a material, a color, or a whole background. - **Inpainting** - Mask a region and regenerate only that area, keeping the rest of the frame pixel-identical. ## Image models on one key | Model | Provider | Price | | --- | --- | --- | | Flux/flux-2-klein | Black Forest Labs | $0.03 / image | | Flux/flux-dev | Black Forest Labs | $0.06 / image | | Flux/flux-pro | Black Forest Labs | $0.07 / image | | Flux 2/flux-2-flex-remix-image | Black Forest Labs | $0.14-$0.24 / image | | Flux 2/flux-2-flex-text-to-image | Black Forest Labs | $0.14-$0.24 / image | | Flux 2/flux-2-max-remix-image | Black Forest Labs | $0.15 / image | | Flux 2/flux-2-max-text-to-image | Black Forest Labs | $0.15 / image | | Flux 2/flux-2-pro-remix-image | Black Forest Labs | $0.06-$0.07 / image | [View all 57 image models](https://runapi.ai/models.md) ## Quickstart ### Generate an image #### curl ```bash curl https://runapi.ai/api/v1/flux/text_to_image \ -H "Authorization: Bearer $RUNAPI_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"flux-2-klein","prompt":"A cobalt vase on white marble."}' ``` #### Python ```python import json import os import requests response = requests.post( "https://runapi.ai/api/v1/flux/text_to_image", headers={"Authorization": f"Bearer {os.environ['RUNAPI_API_KEY']}"}, json=json.loads("{\"model\":\"flux-2-klein\",\"prompt\":\"A cobalt vase on white marble.\"}") ) response.raise_for_status() print(response.json()) ``` #### Node.js ```javascript const response = await fetch("https://runapi.ai/api/v1/flux/text_to_image", { method: "POST", headers: { "Authorization": "Bearer " + process.env.RUNAPI_API_KEY, "Content-Type": "application/json" }, body: JSON.stringify({"model":"flux-2-klein","prompt":"A cobalt vase on white marble."}) }); console.log(await response.json()); ``` #### Go ```go package main import ( "io" "net/http" "os" "strings" ) func main() { payload := strings.NewReader("{\"model\":\"flux-2-klein\",\"prompt\":\"A cobalt vase on white marble.\"}") request, err := http.NewRequest("POST", "https://runapi.ai/api/v1/flux/text_to_image", payload) if err != nil { panic(err) } request.Header.Set("Authorization", "Bearer "+os.Getenv("RUNAPI_API_KEY")) request.Header.Set("Content-Type", "application/json") response, err := http.DefaultClient.Do(request) if err != nil { panic(err) } defer response.Body.Close() io.Copy(os.Stdout, response.Body) } ``` #### Response ```json { "id": "tsk_example", "status": "processing" } ``` ## Four Steps to Your First Generation **How it works** 1. **Get Your API Key** - One key for all 57 image models. 2. **Choose a Model** - Flux, Midjourney, GPT Image, Ideogram, Recraft — pick by style or speed. 3. **Send a Request** - POST to /api/v1/flux/text_to_image. We route to the best provider at the lowest price. 4. **Download Result** - Response includes a CDN URL. Images typically ready in 3-15 seconds. ## Why Developers Choose RunAPI - **One Key, All Models** - Stop juggling API keys. One integration gives you access to 57 image models across all providers. - **15-25% Cost Savings** - Our volume agreements with providers mean lower prices than going direct. No markup on top. - **Automatic Failover** - If a provider goes down, we route to the next best option. Your app stays up. - **OpenAI-Compatible** - Drop-in replacement for OpenAI SDK. Change one line of code to access any model. - **Real-Time Billing** - Pay only for what you use. Per-request pricing with no minimums. Track costs per model, per project. - **Data Privacy** - Our Privacy Policy explains how request data and generated content are processed and retained. ### Explore ## More AI APIs - [Video API](https://runapi.ai/models.md?modality=video) - Generate, edit, and upscale video with 76 models [Learn more](https://runapi.ai/models.md?modality=video) - [Music API](https://runapi.ai/models.md?modality=audio_music) - Compose original tracks with AI [Learn more](https://runapi.ai/models.md?modality=audio_music) - [Audio API](https://runapi.ai/models.md?modality=audio_music) - Text-to-speech with 32 voices [Learn more](https://runapi.ai/models.md?modality=audio_music) - [LLM API](https://runapi.ai/models.md?modality=text) - Chat completions with 66 language models [Learn more](https://runapi.ai/models.md?modality=text) ## What teams build with it - **Product Catalogs** - Generate on-brand shots for thousands of SKUs, then cut backgrounds in the same pipeline. - **Ad Creative** - Batch variants per channel and aspect ratio. Swap models without touching request code. - **App Features** - Ship avatar, sticker, or thumbnail generation as a product feature with per-key spend caps. - **Design Systems** - Keep a series consistent with image-to-prompt, then iterate with masked inpainting. ## RunAPI vs alternatives | Feature | RunAPI | Direct API | Replicate | | --- | --- | --- | --- | | Image models | 57 | 1 provider | ~20 | | Pricing | 15-25% below official | Official rate | Market rate + GPU markup | | Response time | 3-15s typical | Varies | Cold start delays | | Unified billing | ✓ | ✗ | ✓ | | MCP server | ✓ | ✗ | ✗ | | Provider failover | ✓ | ✗ | ✗ | ## Image API questions ### How is image generation billed? Per image or per megapixel, depending on the model. The catalog lists the exact unit next to each price. ### Can I edit an image I already have? Yes. Pass your image with task_type image_edit or inpaint, plus an instruction or a mask. ### Is Midjourney really available over API? Yes, through RunAPI's managed integration. It uses the same request shape as every other image model. ### What is the maximum resolution? Native resolution depends on the selected model; dedicated upscalers can produce 4K output where supported. ### Do you keep my images? Output retention follows the active endpoint contract. RunAPI does not use prompts or outputs for training. ### Can I set a per-project spend limit? Yes. Create a separate API key per project and set its available credit and reset cycle. ## Add image generation to your product 57 models behind one OpenAI-shaped request. Start free, no credit card required. - [Get API Key](https://runapi.ai/login) - [Read the Docs](https://runapi.ai/docs/guides) --- ## More from RunAPI - [Home](https://runapi.ai/.md) ### Product - [Model Catalog](https://runapi.ai/models.md) - [Pricing](https://runapi.ai/pricing.md) - [Providers](https://runapi.ai/models#all-models) ### Developers - [Documentation](https://runapi.ai/docs/guides) - [SDKs](https://runapi.ai/sdk.md) - [CLI](https://runapi.ai/cli.md) - [MCP Server](https://runapi.ai/mcp.md) ### Guides - [Claude Code vs Cursor](https://runapi.ai/claude-code-vs-cursor.md) - [Cursor API Setup](https://runapi.ai/cursor-api-setup.md) - [RunAPI vs OpenRouter](https://runapi.ai/openrouter-alternative.md) ### Company - [Enterprise](https://runapi.ai/contact.md) - [Contact](https://runapi.ai/contact.md) ### Legal - [Terms](https://runapi.ai/terms.md) - [Privacy](https://runapi.ai/privacy.md) - [Site index for agents](https://runapi.ai/llms.txt) Contact: contact@runapi.ai ## Structured data ```json [ { "@context": "https://schema.org", "inLanguage": "en", "@type": "WebSite", "name": "RunAPI", "url": "https://runapi.ai/", "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://runapi.ai/models?q={search_term_string}" }, "query-input": "required name=search_term_string" } }, { "@context": "https://schema.org", "inLanguage": "en", "@type": "Organization", "name": "RunAPI", "url": "https://runapi.ai/", "logo": { "@type": "ImageObject", "url": "https://runapi.ai/icon.svg" }, "sameAs": [ "https://github.com/runapi-ai" ] }, { "@context": "https://schema.org", "inLanguage": "en", "@type": "SoftwareApplication", "name": "RunAPI", "applicationCategory": "DeveloperApplication", "description": "Generate, edit, upscale, and remove backgrounds with image models through one API.", "url": "https://runapi.ai/image" }, { "@context": "https://schema.org", "inLanguage": "en", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://runapi.ai/" }, { "@type": "ListItem", "position": 2, "name": "RunAPI", "item": "https://runapi.ai/image" } ] } ] ```