---
title: "Stable Diffusion 3.5 Large API pricing"
canonical: "https://router.xark.io/models/sd-3-5-large"
description: "Stable Diffusion 3.5 Large at $0.0210/img, 40% below the official rate. Stability Community licensed, OpenAI-compatible."
section: "models"
updated: "2026-09-02"
source: "https://router.xark.io/models/sd-3-5-large.md"
---

# Stable Diffusion 3.5 Large API pricing

Stable Diffusion 3.5 Large costs $0.0210 per image, against an official rate of $0.0350 — 40% below official pricing. It is a Stability AI model under the Stability Community licence, callable through an OpenAI-compatible endpoint with the model id `stabilityai/sd-3.5-large`. This model is listed for reference and is not currently served by an upstream provider, so requests for it return no available channel.

**Availability:** not currently served. No configured upstream carries Stable Diffusion 3.5 Large, so a request naming `stabilityai/sd-3.5-large` returns `no available channel`. The rate below is what it will cost once an upstream carries it. 7 of the 24 catalogued models are callable today.

## At a glance

| Field | Value |
| --- | --- |
| Model id | `stabilityai/sd-3.5-large` |
| Publisher | Stability AI |
| Modality | image |
| Licence | Stability Community — [what it permits](https://router.xark.io/licences/stability-community.md) |
| Capacity | 1MP |
| Released | Oct 22, 2024 |
| Unit | per image |
| Saving vs official | 40% |
| Callable today | No |

## Pricing

| Line item | Applies to | Our rate | Official rate | Saving |
| --- | --- | --- | --- | --- |
| Image output | All requests | $0.0210/img | $0.0350/img | 40% off |

## Other providers carrying this model

| Provider | Input | Output |
| --- | --- | --- |
| AI Token Router | $0.0210/img | — |
| Replicate | $0.0400/img | — |
| fal.ai | $0.0380/img | — |
| Publisher (official) | $0.0350/img | — |

## What it is

Deep ecosystem of LoRAs and ControlNets. The pick when you need fine-grained control rather than raw one-shot quality.

## Good for

- ControlNet and LoRA-driven pipelines
- Style-consistent brand asset generation
- Existing SD-based workflows

## Calling it

### Python

```python
from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://router.xark.io/api/v1"   # ← the only line that changes
)

response = client.chat.completions.create(
    model="stabilityai/sd-3.5-large",
    messages=[{"role": "user", "content": "Hello"}]
)
```

### Node.js

```javascript
import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.ROUTER_API_KEY,
  baseURL: "https://router.xark.io/api/v1"   // ← the only line that changes
});

const response = await client.chat.completions.create({
  model: "stabilityai/sd-3.5-large",
  messages: [{ role: "user", content: "Hello" }]
});
```

### cURL

```bash
curl https://router.xark.io/api/v1/chat/completions \
  -H "Authorization: Bearer $ROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "stabilityai/sd-3.5-large",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
```

## Questions

### What does Stable Diffusion 3.5 Large cost on AI Token Router, and what is the official rate?

Stable Diffusion 3.5 Large is billed at $0.0210 per image here, against Stability AI's official $0.0350 — 40% below, or $0.0140 per image back. There is no platform fee, no minimum spend and no per-job surcharge on top of that rate, and failed requests are not billed. The official figure is published next to ours because a discount with no stated benchmark is not a claim anyone can check.

### Can I call Stable Diffusion 3.5 Large right now?

No. Stable Diffusion 3.5 Large is catalogued but not currently servable — no configured upstream provider carries it, so a request naming `stabilityai/sd-3.5-large` returns `no available channel` instead of a result. The rate on this page is what it will cost once an upstream serves it, not something you can spend today. The image models you can call today are Qwen-Image. 7 of the 24 catalogued models are callable, and every page says which it is.

### How do I generate an image with Stable Diffusion 3.5 Large?

POST to `https://router.xark.io/api/v1/images/generations` with `"model": "stabilityai/sd-3.5-large"` and a prompt, or call `images.generate` on an OpenAI SDK pointed at `https://router.xark.io/api/v1`. The request and response shapes follow the OpenAI images API, so an existing integration needs the base URL and the model id changed and nothing else. The bare name `sd-3.5-large` and the URL slug `sd-3-5-large` resolve to the same model.

### What resolution does Stable Diffusion 3.5 Large output, and what counts as one billable image?

Stable Diffusion 3.5 Large outputs at 1MP. Billing is per generated image at $0.0210/img — one rate, so resolution, prompt length and the number of denoising steps do not change what you are charged, and a request that fails is not billed at all. Asking for several images in one call bills as that many images, which is the same as making the calls separately.

### What licence is Stable Diffusion 3.5 Large under, and can I use it commercially?

Stable Diffusion 3.5 Large is published by Stability AI under the Stability Community licence. That is Stability AI's own licence rather than a standard open-source text, so what it permits is set by the document and not by anything inferable from its name. What we can state: it allows third-party hosting, which is the condition for a model appearing in this catalogue at all — we do not resell access to closed-weight models. Conditions such as user thresholds, attribution requirements or acceptable-use terms are common in licences of this kind, so read Stability AI's text before you ship.

### How does Stable Diffusion 3.5 Large pricing here compare with other providers carrying it?

Of the 2 other providers we track carrying Stable Diffusion 3.5 Large, the lowest is fal.ai at $0.0380/img, against our $0.0210/img. That is where the rates stood when we last reconciled them, and it can change without notice — we are not claiming to be the cheapest source for this model, only that our rate sits below Stability AI's official $0.0350/img. If you find one of these figures stale, tell us and we will correct it.

### What is Stable Diffusion 3.5 Large actually good at?

Deep ecosystem of LoRAs and ControlNets. The pick when you need fine-grained control rather than raw one-shot quality. In practice that points at controlNet and LoRA-driven pipelines, style-consistent brand asset generation and existing SD-based workflows. The specifics that actually decide a fit — the rate, the licence and what it will and will not serve today — are all on this page rather than behind a sales conversation.

## Related models

| Model | Our rate | Callable | Document |
| --- | --- | --- | --- |
| FLUX.2 [schnell] | $0.0018/img | No | [read](https://router.xark.io/models/flux-2-schnell.md) |
| Qwen-Image | $0.0120/img | Yes | [read](https://router.xark.io/models/qwen-image.md) |
| HiDream-I1 | $0.0150/img | No | [read](https://router.xark.io/models/hidream-i1.md) |