Models
Sourceful
Riverflow 2 Standard Preview

Sourceful

Riverflow 2 Standard Preview

Name: Riverflow 2 Standard Preview
Brand: Sourceful
Price: 0.035 USD
Availability: InStock

AI Image Editing Model

Image

Sourceful's balanced Riverflow 2 variant combining realistic output with reliable detail control and smooth integration of reference products for professional image creation

Try Model

1024 x 1024

Max Resolution

Supported Modes

Image Edit

Active

Details

Model ID

riverflow-2-standard-preview

Also known as: riverflow-2-standard, riverflow-2-base, riverflow-2

Creator

Sourceful

Family

riverflow

Max Input Images

Ready to integrate?

Access riverflow-2-standard-preview via our unified API.

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Available at 1 provider

Starting from

$0.035 /image via Runware

Prices shown are in USD

Full pricing details

Providers & Pricing (1)

Riverflow 2 Standard Preview is available exclusively through Runware, starting at $0.035/image.

Runware

runware/riverflow-2-standard-preview

Provider Model ID: sourceful:2@1

$0.035 /image

View pricing details

riverflow-2-standard API OpenAI-compatible

Integrate text-to-image generation and advanced image editing into any application using the Lumenfall OpenAI-compatible API to access Riverflow 2 Standard Preview's professional-grade visual output.

Base URL

https://api.lumenfall.ai/openai/v1

Model

riverflow-2-standard-preview

Code Examples

Image Edit

/v1/images/edits

curl -X POST \

  https://api.lumenfall.ai/openai/v1/images/edits \

  -H "Authorization: Bearer $LUMENFALL_API_KEY" \

  -F "model=riverflow-2-standard-preview" \

  -F "[email protected]" \

  -F "prompt=Add a starry night sky to this image" \

  -F "size=1024x1024"

# Response:

# { "created": 1234567890, "data": [{ "url": "https://...", "revised_prompt": "..." }] }

import OpenAI from 'openai';

import fs from 'fs';

const client = new OpenAI({

  apiKey: 'YOUR_API_KEY',

  baseURL: 'https://api.lumenfall.ai/openai/v1'

});

const response = await client.images.edit({

  model: 'riverflow-2-standard-preview',

  image: fs.createReadStream('source.png'),

  prompt: 'Add a starry night sky to this image',

  size: '1024x1024'

});

// { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] }

console.log(response.data[0].url);

from openai import OpenAI

client = OpenAI(

    api_key="YOUR_API_KEY",

    base_url="https://api.lumenfall.ai/openai/v1"

response = client.images.edit(

    model="riverflow-2-standard-preview",

    image=open("source.png", "rb"),

    prompt="Add a starry night sky to this image",

    size="1024x1024"

# { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] }

print(response.data[0].url)

Parameter Reference

Required Supported Not available

Core Parameters

Parameter	Type	Description	Modes
`prompt`	string	Required. Edit instruction for the image	Edit

Size & Layout

Parameter	Type	Description	Modes
`size`	string	Image dimensions as WxH pixels (e.g. "1024x1024") or aspect ratio (e.g. "16:9") WxH determines both shape and scale (aspect_ratio and resolution are ignored when size is provided). W:H format is equivalent to aspect_ratio.	Edit
`aspect_ratio`	string	Aspect ratio of the output image (e.g. "16:9", "1:1") Controls shape independently of scale. Use with resolution to control both. If size is also provided, size takes precedence. Any ratio is accepted and mapped to the nearest supported value.	Edit
`resolution`	string	Output resolution tier (e.g. "1K", "4K") Controls scale independently of shape. Higher tiers produce larger images and cost more. If size is also provided, size takes precedence for scale. Any tier is accepted and mapped to the nearest supported value.	Edit

size

Exact pixel dimensions

"1920x1080"

aspect_ratio

Shape only, default scale

"16:9"

resolution

Scale tier, preserves shape

"1K"

Priority when combined

size › aspect_ratio + resolution › aspect_ratio › resolution

size is most specific and always wins. aspect_ratio and resolution control shape and scale independently.

How matching works

Shape matching – we pick the closest supported ratio. Ask for 7:1 on a model with 4:1 and 8:1, you get 8:1.

Scale matching – providers use different tier formats: K tiers (0.5K 1K 2K 4K) or megapixel tiers (0.25 1). If the exact tier isn't available, you get the nearest one.

Dimension clamping – if a model has pixel limits, we clamp dimensions to fit and keep the aspect ratio intact.

Media Inputs

Parameter	Type	Description	Modes
`image`	file	Required. Input image(s) to edit Supports PNG, JPEG, WebP.	Edit

Output & Format

Parameter	Type	Description	Modes
`response_format`	string	How to return the image `url` `b64_json` Default: `"url"`	Edit
`output_format`	string	Output image format `png` `jpeg` `gif` `webp` `avif` Gateway converts to requested format if provider doesn't support it natively.	Edit
`output_compression`	integer	Compression level for lossy formats (JPEG, WebP, AVIF)	Edit
`n`	integer	Number of images to generate Default: `1` Gateway generates multiple images in parallel even if provider only supports 1.	Edit

Parameter Normalization

How we handle parameters across different providers

Not every provider speaks the same language. When you send a parameter, we handle it in one of four ways depending on what the model supports:

Behavior	What happens	Example
`passthrough`	Sent as-is to the provider	style, quality
`renamed`	Same value, mapped to the field name the provider expects	prompt
`converted`	Transformed to the provider's native format	size
`emulated`	Works even if the provider has no concept of it	n, response_format

Parameters we don't recognize pass straight through to the upstream API, so provider-specific options still work.

Full API Reference Authentication, endpoints, and more

Gallery

View all 2 images

Riverflow 2 Standard Preview FAQ

How much does Riverflow 2 Standard Preview cost?

Riverflow 2 Standard Preview starts at $0.035 per image through Lumenfall. Pricing varies by provider. Lumenfall does not add any markup to provider pricing.

How do I use Riverflow 2 Standard Preview via API?

You can use Riverflow 2 Standard Preview through Lumenfall's OpenAI-compatible API. Send requests to the unified endpoint with model ID "riverflow-2-standard-preview". Code examples are available in Python, JavaScript, and cURL.

Which providers offer Riverflow 2 Standard Preview?

Riverflow 2 Standard Preview is available through Runware on Lumenfall. Lumenfall automatically routes requests to the best available provider.

What is the maximum resolution for Riverflow 2 Standard Preview?

Riverflow 2 Standard Preview supports images up to 1024x1024 resolution.

Overview

Riverflow 2 Standard Preview is a generative image model developed by Sourceful, designed to sit at the intersection of photorealistic rendering and precise compositional control. It operates as a multimodal bridge, accepting both text and image inputs to produce high-fidelity visual outputs. This “Standard” variant is specifically tuned to maintain structural integrity while integrating external reference products into generated scenes.

Strengths

Reference Integration: Excels at “product-in-scene” generation, where a source image of an object is placed into a new environment while maintaining the object’s original proportions and material properties.
Structural Detail Control: Demonstrates high reliability in following layout constraints provided via image prompts, reducing the “hallucination” of stray limbs or distorted architectural elements.
Balanced Text-to-Image Alignment: Accurately translates complex atmospheric descriptions (lighting, weather, texture) without sacrificing the sharpness of the primary subjects.
Photorealistic Texture Rendering: Particularly effective at simulating organic surfaces such as skin, fabric, and wood grain with a neutral, non-stylized finish.

Limitations

Standard vs. Pro Performance: As the “Standard” variant, it may lack the extreme prompt-adherence granularity found in higher-tier “Pro” versions of the Riverflow family.
Preview Status: This specific version is a preview release, which means users may encounter occasional inconsistencies in edge-case prompt scenarios that will be refined in the final production release.
Inference Latency: Due to its focus on structural fidelity and reference integration, it may have slightly longer generation times compared to models optimized solely for speed.

Technical Background

Riverflow 2 belongs to the Riverflow family of diffusion models, utilizing a specialized architecture focused on multimodal input processing. It is engineered to prioritize “detail control,” likely leveraging an enhanced attention mechanism that balances global prompt semantics with localized image reference features. This training approach allows the model to treat reference images as grounding constraints rather than just aesthetic guides.

Best For

This model is best suited for professional product photography mockups, interior design visualization, and e-commerce asset generation where consistency between a physical object and its generated environment is critical. It is also an excellent choice for creators who need to iterate on specific layouts using image-to-image workflows. Riverflow 2 Standard Preview is accessible through Lumenfall’s unified API and interactive playground, allowing developers to test its reference-handling capabilities alongside other industry-standard models.

Try Riverflow 2 Standard Preview in Playground

Generate images with custom prompts — no API key needed.

Open Playground