MiniMax H3 Image API
MiniMax's H3 Image for text-to-image generation and editing with up to sixteen references, at 1K, 2K or 4K.
MiniMax H3 Image is an image generation model from MiniMax, available on OttoPort's OpenAI-compatible API as the model ID minimax-h3-image at $0.033 / image as of 2026-11-14.
Provider
MiniMax
Price
$0.033 / image
Model ID
minimax-h3-image
Type
image generation model
Create with MiniMax H3 Image
image
MiniMax H3 Image API pricing
What OttoPort bills for MiniMax H3 Image, and what that works out to per unit. Rates are read from the same catalog the gateway meters against, and were current on 2026-11-14.
| Per image | $0.033 | at the model's base resolution |
|---|---|---|
| Images per $1 | 30 | |
| 100 images | $3.30 | |
| Up to 2048px longest side | $0.033 | 1× the base rate |
| Up to 4096px longest side | $0.099 | 3× the base rate |
No subscription and no minimum — OttoPort bills prepaid credits against usage. See the full rate card.
Call MiniMax H3 Image in three lines
Send "model": "minimax-h3-image" to POST https://ottoport.ai/api/v1/images/generations with an OttoPort key. No MiniMax account, no waitlist, no separate SDK.
curl https://ottoport.ai/api/v1/images/generations \
-H "Authorization: Bearer $OTTOPORT_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "minimax-h3-image",
"prompt": "a chrome torus on a black background, studio light",
"size": "1024x1024",
"n": 1
}'from openai import OpenAI
client = OpenAI(api_key="op-...", base_url="https://ottoport.ai/api/v1")
resp = client.images.generate(
model="minimax-h3-image",
prompt="a chrome torus on a black background, studio light",
size="1024x1024",
n=1,
)
print(resp.data[0].url)import OpenAI from "openai";
const client = new OpenAI({ apiKey: "op-...", baseURL: "https://ottoport.ai/api/v1" });
const resp = await client.images.generate({
model: "minimax-h3-image",
prompt: "a chrome torus on a black background, studio light",
size: "1024x1024",
n: 1,
});
console.log(resp.data[0].url);Before you start
- 1. Create a key at /api-keys.
- 2. Top up credits — the smallest pack is $25.
- 3. Paste the request. It returns on the same request.
Full reference at /docs, or drive it from an agent with the MCP server and CLI.
Request parameters
The body POST https://ottoport.ai/api/v1/images/generations accepts for MiniMax H3 Image.
| Field | Type | Required | Notes |
|---|---|---|---|
| model | string | Yes | Always minimax-h3-image for MiniMax H3 Image. |
| prompt | string | Yes | What to generate. |
| size | string | No | e.g. 1024x1024. Resolutions above the base tier bill at a multiplier. |
| resolution | string | No | One of: 1k, 2k, 4k. Tiers above this model's base rate bill at a multiplier. |
| aspect_ratio | string | No | e.g. 16:9. Read only when size is absent. |
| n | integer | No | How many images to return. Each one bills separately. |
| image_url | string | No | A source image, for editing and reference-led generation. |
| image_urls | array | No | Several reference images at once, up to the model's limit — see its capabilities in /v1/models. Up to 16. |
MiniMax H3 Image direct vs through OttoPort
MiniMax H3 Image is the same model either way — what changes is how many accounts, keys, and integrations you carry to reach it.
| MiniMax direct | Via OttoPort | |
|---|---|---|
| Accounts and keys | A MiniMax account, plus one more for every other model you add | One OttoPort account and one key for the whole catalog |
| Request shape | MiniMax's own SDK and response format | OpenAI-compatible — point baseURL at OttoPort and change the model string |
| Switching models | A new integration per provider | Replace minimax-h3-image with any other model ID in the catalog |
| Billing | A separate invoice and contract per provider | Prepaid credits, no subscription, one usage ledger |
| Provider outages | Your call fails | Configured backup routes are tried in order on provider failure |
Put the hero subject first.
Describe composition and lighting.
Specify format and visual style.
MiniMax H3 Image API questions
Cost, keys, and model IDs for MiniMax H3 Image on OttoPort.
How much does the MiniMax H3 Image API cost?
On OttoPort, MiniMax H3 Image costs $0.033 / image as of 2026-11-14. For scale, images per $1: 30. Billing is prepaid usage with no subscription and no minimum, and the current rate is always published at ottoport.ai/pricing.
How do I get a MiniMax H3 Image API key?
You do not need a MiniMax key. Create an OttoPort account, generate a key at ottoport.ai/api-keys, and send it as "Authorization: Bearer <key>" to POST https://ottoport.ai/api/v1/images/generations with "model": "minimax-h3-image". The same key reaches every other model in the catalog.
What is the model ID for MiniMax H3 Image?
The OttoPort model ID for MiniMax H3 Image is minimax-h3-image. Pass it as the model field on POST https://ottoport.ai/api/v1/images/generations, or list it programmatically from GET https://ottoport.ai/api/v1/models.
Can I call MiniMax H3 Image with the OpenAI SDK?
Yes. Set the OpenAI SDK's base URL to https://ottoport.ai/api/v1, use an OttoPort API key, and pass minimax-h3-image as the model. Image generation follows the OpenAI images shape, so existing code works after changing two lines.
Do I need a MiniMax account to use MiniMax H3 Image?
No. OttoPort connects to MiniMax on your behalf, so one OttoPort account covers MiniMax H3 Image and every other model in the catalog — no per-provider contracts, keys, or invoices.
Other image generation models on the same API
Same endpoint, same key — swapping model is a one-string change from minimax-h3-image.
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GPT Image 2.5 Flare API
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$0.026 / image
Nano Banana 2.1 API
$0.088 / image
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$0.022 / image
Browse the full catalog — every model with its provider and per-unit price.