Is there one API for GPT Image, Nano Banana and FLUX?

Yes. varg runs GPT Image 2.5 ("gpt_image_2_5"), Nano Banana 2.1 ("nano_banana_2_1"), Flux 3 Image ("flux_3_image") and 55 more image models behind one endpoint, POST https://api.varg.ai/v2/tools/image/call, with one API key and one credit balance. The request has the same shape for each: change the "model" string to switch.

How much does the AI image API cost?

Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. For example: GPT Image 2.5 from $0.01 per run, Nano Banana 2.1 from $0.05 per run, Flux 3 Image from $0.02 per run, Seedream 5 Pro from $0.0675/image and Grok Imagine Image 2.0 from $0.04 per run. Among the image models with a stated run price, the lowest is Flux 3 Image Klein: from $0.01 per run. For the exact price of a request before you run it, send the same body to POST https://api.varg.ai/v2/estimate.

How do I call the AI image API?

Send POST https://api.varg.ai/v2/tools/image/call with the header "Authorization: Bearer $VARG_API_KEY" and a JSON body that includes "model", for example "model": "gpt_image_2_5". The call answers 202 with a job right away. Poll GET https://api.varg.ai/v2/jobs/{id} until "status" is "completed", then read output.outputs[0].url, or pass options.webhook_url to be called back.

Can I use these AI image models from Claude, ChatGPT or Cursor?

Yes. Add the varg MCP server (https://mcp.varg.ai/mcp) to Claude, ChatGPT, Cursor or any other MCP client and sign in with varg, with no API key to paste. The agent runs a model with call_tool, passing tool "image" and the model id, for example "model": "gpt_image_2_5".

58 models · 14 families · one API key

AI image API

varg runs 58 AI image models behind one endpoint and one API key. 14 model families are listed below, with their flagships: GPT Image 2.5, Nano Banana 2.1, Flux 3 Image, Seedream 5 Pro and 10 more. The request has the same shape for each of them: the "model" string picks the model.

Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01.

POST /v2/tools/image/call

curl -X POST https://api.varg.ai/v2/tools/image/call \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt_image_2_5",
  "prompt": "A photorealistic product photo of a coffee bag labeled \"Summit Roast\" with mountain artwork, on a rustic wooden table"
}'

To run another model, change "model": nano_banana_2_1, flux_3_image, seedream_5_pro, grok_imagine_image_2, topaz.

Try GPT Image 2.5 in the Playground Get an API key

AI image model families

Each family has a page with all of its models, and each model a page with its parameters. The price is the flagship's own, in US dollars, with no markup.

AI image model families on varg
Family	Flagship model	Catalog description	Flagship price	Models
GPT Image API	GPT Image 2.5`gpt_image_2_5`	OpenAI GPT Image 2.5, in the Flare and Sunburst variants. Text-to-image and image editing, priced by quality.	From $0.01 per runfrom $0.01/image	9
Nano Banana API	Nano Banana 2.1`nano_banana_2_1`	Nano Banana 2.1 by Google. Top-ranked image generation and editing: sharper layouts and text, consistent subjects, 1K-4K and extreme aspect ratios.	From $0.05 per runfrom $0.05/image	6
FLUX API	Flux 3 Image`flux_3_image`	Black Forest Labs FLUX 3 Image. Newest image model — native 2K/4K, precise layout control, improved text rendering. Edits with up to 10 references.	From $0.02 per run$0.048/MP	6
Seedream API	Seedream 5 Pro`seedream_5_pro`	ByteDance Seedream 5 Pro. Text-to-image and image editing.	From $0.0675/image	4
Grok Imagine API	Grok Imagine Image 2.0`grok_imagine_image_2`	Grok Imagine Image 2.0 by xAI. Top-ranked image generation and editing with strong text rendering, up to 2K.	From $0.04 per runfrom $0.04/image	3
Topaz API	Topaz Image Upscale`topaz`	Topaz-quality image upscaling.	From $0.16 per run$0.16/image	1
SeedVR API	SeedVR Image Upscale`seedvr`	ByteDance SeedVR image upscaler. Good quality at moderate cost.	From $0.10 per run$0.10/image	1
Krea API	Krea 3`krea_3`	Krea 3 (early access). Krea's newest image model — text-to-image and edits with up to 8 input images, fast / high / ultra thinking, 1K or 2K.	From $0.01 per run$0.024/MP	6
Ideogram API	Ideogram 4.5`ideogram_v4_5`	Posters, logos and designs with accurate text. Attach an image to edit it — up to 4 references, an optional mask, and a high-precision mode that…	From $0.01 per runfrom $0.008/image	2
Recraft API	Recraft V4.1 Flash`recraft_v4_1_flash`	Recraft V4.1 Flash. Fast, very low-cost images from text — photography, illustration, mixed media — with color palette and background color control.	$0.007/image	3
Bria API	Bria FIBO 2.0`bria_fibo_2`	Bria FIBO 2.0. Commercially safe image generation and editing trained on licensed data; strong on knowledge-heavy prompts, with structured scene…	From $0.04 per run	5
Qwen Image API	Qwen Image 3`qwen_image_3`	Qwen-Image 3 by Alibaba. Dense, accurate text in 12 languages, long prompts, comics and infographics up to 2048 px; edits combine up to three images.	From $0.04 per runfrom $0.04/image	2
Phota API	Phota`phota`	Phota image generation. High-quality photorealistic output.	From $0.09 per run$0.09/image	3
Higgsfield Soul API	Soul`soul`	Higgsfield Soul. 100+ character styles. Perfect for UGC creators.	From $0.05 per run$0.05/image	1

More image models

All models and prices · AI video API

Call the AI image API

One endpoint for every image model. The call below runs GPT Image 2.5; the "model" string picks the model, and the rest of the request keeps its shape.

REST

POST https://api.varg.ai/v2/tools/image/call with Authorization: Bearer $VARG_API_KEY. It answers 202 with a job right away; poll GET /v2/jobs/{id} until its status is completed, then read output.outputs[0].url.

POST /v2/tools/image/call

curl -X POST https://api.varg.ai/v2/tools/image/call \
  -H "Authorization: Bearer $VARG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt_image_2_5",
  "prompt": "A photorealistic product photo of a coffee bag labeled \"Summit Roast\" with mountain artwork, on a rustic wooden table"
}'

From Claude, ChatGPT or Cursor (MCP)

The varg MCP server, https://mcp.varg.ai/mcp, runs GPT Image 2.5 with call_tool. Sign in with varg, no API key to paste. How to connect it

Claude Code

claude mcp add --transport http varg https://mcp.varg.ai/mcp

call_tool

{
  "tool": "image",
  "input": {
    "model": "gpt_image_2_5",
    "prompt": "A photorealistic product photo of a coffee bag labeled \"Summit Roast\" with mountain artwork, on a rustic wooden table"
  },
  "wait": true
}

From a terminal (CLI)

vargai is the varg command line: every tool of the MCP server is a command. Install and log in

vargai

curl -fsSL https://varg.ai/install | sh
vargai call_tool --tool image '{"model":"gpt_image_2_5","prompt":"A photorealistic product photo of a coffee bag labeled \"Summit Roast\" with mountain artwork, on a rustic wooden table"}'

How billing works

Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. varg's fee is on the top-up, not on the run: 5.5% of the credits you buy ($0.80 at the least), or 8% for a team workspace. Pricing

AI image models compared

Price, limits and inputs side by side, from the same catalog as this page.

How to use it

Step-by-step pages on varg how to.

AI image API: questions

Is there one API for GPT Image, Nano Banana and FLUX?: Yes. varg runs GPT Image 2.5 ("gpt_image_2_5"), Nano Banana 2.1 ("nano_banana_2_1"), Flux 3 Image ("flux_3_image") and 55 more image models behind one endpoint, POST https://api.varg.ai/v2/tools/image/call, with one API key and one credit balance. The request has the same shape for each: change the "model" string to switch.
How much does the AI image API cost?: Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. For example: GPT Image 2.5 from $0.01 per run, Nano Banana 2.1 from $0.05 per run, Flux 3 Image from $0.02 per run, Seedream 5 Pro from $0.0675/image and Grok Imagine Image 2.0 from $0.04 per run. Among the image models with a stated run price, the lowest is Flux 3 Image Klein: from $0.01 per run. For the exact price of a request before you run it, send the same body to POST https://api.varg.ai/v2/estimate.
Which AI image models take an image as input?: 43 of the 58 have a route that starts from an image, among them GPT Image 2.5, Nano Banana 2.1, Flux 3 Image, Seedream 5 Pro, Grok Imagine Image 2.0, Topaz Image Upscale and 5 more. Pass the image as a URL in "files".
How do I call the AI image API?: Send POST https://api.varg.ai/v2/tools/image/call with the header "Authorization: Bearer $VARG_API_KEY" and a JSON body that includes "model", for example "model": "gpt_image_2_5". The call answers 202 with a job right away. Poll GET https://api.varg.ai/v2/jobs/{id} until "status" is "completed", then read output.outputs[0].url, or pass options.webhook_url to be called back.
Can I use these AI image models from Claude, ChatGPT or Cursor?: Yes. Add the varg MCP server (https://mcp.varg.ai/mcp) to Claude, ChatGPT, Cursor or any other MCP client and sign in with varg, with no API key to paste. The agent runs a model with call_tool, passing tool "image" and the model id, for example "model": "gpt_image_2_5".

For AI agents: every model has its full spec as Markdown, listed in varg.ai/models/llms.txt.