# GPT Image 2 API (APIMart) vs Stable Diffusion API

GPT Image 2 API (APIMart) records 383,148 monthly visits with +6.3% month-over-month growth and Paid, Contact for Pricing pricing. Stable Diffusion API records 26,802 monthly visits with -21.8% growth and Paid pricing.

| Metric | [GPT Image 2 API (APIMart)](https://openaitools.app/tool/gpt-image-2api) | [Stable Diffusion API](https://openaitools.app/tool/stablediffusion-api) |
| :--- | :--- | :--- |
| Website URL | https://apimart.ai/model/gpt-image-2 | https://stablediffusionapi.com |
| Categories | AI Image Generator, AI API, AI Realistic Image Generator, Text to Image | AI API, AI Image Generator, Text to Image, AI Models |
| Pricing Model | Paid, Contact for Pricing | Paid |
| Monthly Visits | 383,148 | 26,802 |
| MoM Growth Rate | +6.3% | -21.8% |
| Primary Market | Spain | United States |
| Direct Visits | 232,562 | 8,529 |
| Review Score | 2.2 | 4.2 |
| Saved Count | 0 | 6 |
| Supported Platforms | Website | Website |

## GPT Image 2 API (APIMart)

This APIMart page documents a hosted API route for OpenAI's GPT Image 2 image model. APIMart positions itself as a low-cost gateway: developers create a key, set it as an environment variable and send requests to a REST endpoint, with billing handled through credits on the APIMart account rather than a direct OpenAI contract.

The workflow is deliberately asynchronous because image generation takes time. You POST to /v1/images/generations with the model ID, prompt, aspect ratio and resolution tier; the response returns a task ID, and you poll /v1/tasks/{task_id} until the status reads completed, then read the image URL from the result payload. Failed tasks return a reason in the error message. The docs include ready-to-run cURL and Python snippets for both text-to-image and image-to-image cases.

Pricing is presented as token-based with per-image estimates. Text, cached text, image and cached image inputs each have their own credit rate per million tokens, and image output is priced highest. The page compares a discounted membership price against an official channel price that is dramatically higher, which is the main selling point APIMart leans on. The wider GPT Image 2 family — including Flare and Sunburst variants — is listed alongside so users can trade latency for detail.

**Pricing & Plans:** Pay-as-you-go credits with token-based pricing and estimated per-image costs by resolution tier; membership discounts are advertised versus an official-channel price, and enterprise terms are available on request.

- **Text-to-image and image-to-image:** Generate images from a text prompt, or supply reference images to switch into editing mode with multiple references.
- **Resolution and aspect ratio control:** Choose 1k, 2k or 4k output along with a wide set of aspect ratios, from square and portrait to ultra-wide ratios.
- **Asynchronous task workflow:** Submit a POST request to create a task, then poll the task endpoint for the finished image URL.
- **Model family options:** The docs list additional members of the GPT Image line — Flare and Sunburst variants at 2.5 and 2.6 — so you can pick speed or fidelity.
- **Parameter and cost controls:** Use auto, low, medium or high quality settings, cache-aware token pricing and optional prompt moderation through your own key.

**Strengths:** Works with familiar REST conventions and ships cURL/Python examples; Fine-grained control over resolution, aspect ratio and quality; Per-token cost breakdown makes spend predictable at scale; Support for a large number of reference images in editing mode

[Profile (Markdown)](https://openaitools.app/tool/gpt-image-2api.md)

## Stable Diffusion API

Stable Diffusion API gives developers a single HTTP endpoint for the whole Stable Diffusion family and a long list of community checkpoints. Instead of provisioning GPUs, installing PyTorch, and keeping model weights in sync, you send a POST request with a prompt, model id and parameters, and receive generated images plus a track id you can poll or receive via webhook. The catalog the site advertises covers SD 1.5, SDXL, Stable Diffusion 3, FLUX.1 dev/Schnell, FLUX.2 dev, Qwen Image, Z-Image Turbo, video models such as Wan 2.2 and LTX Video, and dedicated families like Realistic Vision, Juggernaut XL, Pony Diffusion, DreamShaper and Illustrious XL.

Beyond plain text-to-image, the API exposes image-to-image, inpainting, upscaling, background removal, ControlNet conditioning, LoRA usage and Dreambooth-style model fine-tuning, so a single integration can cover asset generation, product mockups, advertising variants and interior or fashion visuals. Official code samples for cURL, Python and Node are published for each model page, which shortens the time from signup to a first working request.

The platform is now presented as part of ModelsLab: accounts, API keys and billing live in the ModelsLab dashboard, and the site states that API requests are processed at scale with a 99.99% uptime target. Pricing is transparent and outlined on the site, with plans starting at $21 per month and an unlimited open-source tier for high-volume workloads.

**Pricing & Plans:** Paid plans billed through ModelsLab: Basic $21/month (3,250 API calls, 5 parallel generations), Standard $47/month (10,000 calls, 10 parallel generations), and Open Source Unlimited $149/month or $1,500/year (unlimited generations on self-hosted open-source models, 15 parallel generations). Third-party and closed models are billed separately; Enterprise offers dedicated GPUs and custom SLAs. Creating an account is free, but API access requires a paid plan.

- **Unified REST endpoint:** One POST endpoint handles text-to-image, image-to-image and editing jobs across SD 1.5, SDXL, Flux, ControlNet and LoRA models, with cURL, Python and Node samples for each model.
- **Large community model catalog:** Thousands of community checkpoints and LoRAs, including anime, photorealistic and stylized families, are browsable with their parameters and sample code.
- **Async jobs and webhooks:** Requests return a job id or track id so long-running generations can be polled or pushed to your own webhook endpoint instead of blocking the client.
- **Fine-tuning and training:** Dreambooth-style endpoints let you train custom concepts and styles on your own images, then reuse the resulting model ids in generation calls.
- **Scaling controls and enterprise options:** Parallel generation limits grow by plan, and an enterprise tier provides dedicated GPUs with custom SLAs for high-volume production traffic.

**Strengths:** Single API surface for many base models and thousands of community checkpoints; No GPU provisioning, driver or model-weight maintenance on your side; Publishing-ready code samples for cURL, Python and Node per model; Transparent tiered pricing with an unlimited open-source plan and enterprise GPUs

**Limitations:** API access requires a paid subscription; the free account only unlocks the dashboard; Third-party and closed models are billed separately from the unlimited open-source plan; Call quotas are counted per request, so batch-heavy experiments can consume a plan quickly

[Profile (Markdown)](https://openaitools.app/tool/stablediffusion-api.md)

## Frequently Asked Questions

### How do GPT Image 2 API (APIMart) and Stable Diffusion API compare in monthly traffic?

GPT Image 2 API (APIMart) has 383,148 monthly visits, while Stable Diffusion API has 26,802. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

GPT Image 2 API (APIMart) has a month-over-month growth rate of +6.3%; Stable Diffusion API has -21.8%.

### How does pricing compare?

GPT Image 2 API (APIMart): Paid, Contact for Pricing. Pay-as-you-go credits with token-based pricing and estimated per-image costs by resolution tier; membership discounts are advertised versus an official-channel price, and enterprise terms are available on request. Stable Diffusion API: Paid. Paid plans billed through ModelsLab: Basic $21/month (3,250 API calls, 5 parallel generations), Standard $47/month (10,000 calls, 10 parallel generations), and Open Source Unlimited $149/month or $1,500/year (unlimited generations on self-hosted open-source models, 15 parallel generations). Third-party and closed models are billed separately; Enterprise offers dedicated GPUs and custom SLAs. Creating an account is free, but API access requires a paid plan.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [OpenAI Platform](https://openaitools.app/tool/openai) | 234,678,639 | -9.6% | Paid | Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents. | [.md](https://openaitools.app/tool/openai.md) |
| 2 | [OpenRouter](https://openaitools.app/tool/openrouter-ai) | 19,941,437 | -6.2% | Paid | One API key for hundreds of AI models from every major provider | [.md](https://openaitools.app/tool/openrouter-ai.md) |
| 3 | [MiniMax Image-01](https://openaitools.app/tool/minimax-image-01) | 5,253,734 | -13.2% | Contact for Pricing | MiniMax's open-weight model for turning prompts into images | [.md](https://openaitools.app/tool/minimax-image-01.md) |
| 4 | [fal.ai](https://openaitools.app/tool/fal-ai) | 3,093,684 | -3.7% | Paid, pay-as-you-go usage-based pricing | One API for 1,500+ production-ready generative media models | [.md](https://openaitools.app/tool/fal-ai.md) |
| 5 | [Ideogram](https://openaitools.app/tool/ideogram) | 1,882,585 | -11.3% | Freemium | Generative media platform with models built for readable type and reliable editing | [.md](https://openaitools.app/tool/ideogram.md) |
| 6 | [Together AI](https://openaitools.app/tool/together-ai) | 1,645,930 | +64.9% | Freemium, Paid | Together AI is the AI Native Cloud — a full-stack platform for running, fine-tuning and training open-source models. It spans serverless inference APIs, dedicated endpoints, GPU clusters, post-training and storage, all b | [.md](https://openaitools.app/tool/together-ai.md) |
| 7 | [Replicate AI](https://openaitools.app/tool/replicate-ai) | 904,038 | -8.4% | Paid | Run, fine-tune, and deploy machine learning models with one line of code | [.md](https://openaitools.app/tool/replicate-ai.md) |
| 8 | [Atlas Cloud](https://openaitools.app/tool/atlas-cloud) | 777,031 | -16.4% | Paid | One OpenAI-compatible API for 500+ image, video, audio, and LLM models | [.md](https://openaitools.app/tool/atlas-cloud.md) |
| 9 | [MuAPI](https://openaitools.app/tool/muapi) | 412,788 | +13.7% | Freemium | One API for every generative image, video and audio model | [.md](https://openaitools.app/tool/muapi.md) |
| 10 | [Runware](https://openaitools.app/tool/runware) | 402,862 | +27.1% | Paid | One API for 400K+ AI models, plus serverless and reserved GPUs on modular data centers | [.md](https://openaitools.app/tool/runware.md) |

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Source: https://openaitools.app/compare/gpt-image-2api-vs-stablediffusion-api

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