# Castaly

> Pay-per-generation AI video and image studio with Seedance, Kling, Wan and GPT Image

- Category: [Image & Visual AI](https://finderatlas.com/categories/image-ai)
- Pricing: Paid
- Website: https://castaly.ai
- Platforms: Web, API
- API: available
- Made by: Havenbyte LLC
- Last updated: 2026-10-29
- FinderAtlas page: https://finderatlas.com/tools/castaly

## Overview

Castaly is a web studio for generating AI video and images from third-party models, including Seedance, Kling, Wan, MiniMax and HappyHorse for video and GPT Image, Gemini Image, Seedream and Wan Image for images. Users pick a model, write a prompt, optionally attach a reference image or library asset, set aspect ratio, resolution and duration, and pay per generation from a shared USD wallet. Several listed video models have image-to-video and reference-to-video variants.

## Key features

- Multi-model video generation
- Image generation
- Public per-spec pricing
- Pay per generation
- Reference inputs
- Community remix
- API access
- Creation records

## Pricing

- **Pay-as-you-go** (Usage-based): Top up a shared USD wallet and pay per image, per second of video or per task.
- **Enterprise** (Custom): Volume pricing, higher limits, priority support and custom onboarding.

## Best for

- Comparing several AI video and image models with public per-specification prices and paying only for what is generated

## Who uses it

- Content creators
- Marketers
- Developers
- Teams generating video at volume

## Strengths

- Many video and image models from several makers in one studio
- Public price per specification, shown before generating
- No subscription or minimum, and the wallet balance does not expire
- Same account and wallet work for the studio and the API
- Operator is named in the footer and Modelflare terms

## Limitations

- Reseller of third-party models, so availability and pricing depend on upstream providers
- No free tier or free credits described
- Some models are priced per million tokens, which is harder to estimate than per second
- Web only, with no mobile app
- Castaly's own legal pages return 404; terms are on the Modelflare site

## Not recommended for

- Users who want a flat monthly subscription
- Users who need a free tier

## FinderAtlas editorial scores (out of 10)

- Model Breadth: 8.3/10
- Pricing Clarity: 8/10
- Ease of Use: 7.5/10
- API Access: 7.8/10
- Transparency: 6.8/10

## Alternatives

- [Grok](https://finderatlas.com/tools/grok): xAI's AI assistant with live X and web search, image and voice tools ([compare](https://finderatlas.com/compare/castaly-vs-grok))
- [Canva](https://finderatlas.com/tools/canva): Browser-based design platform with templates, collaboration tools and built-in AI image and video generation ([compare](https://finderatlas.com/compare/canva-vs-castaly))
- [Recraft](https://finderatlas.com/tools/recraft): AI image and vector design studio with brand styles, editing tools and SVG export ([compare](https://finderatlas.com/compare/castaly-vs-recraft))

## FAQ

**What is Castaly?**

A web studio for generating AI video and images from several third-party models, charged per generation from a shared USD wallet.

**Who runs Castaly?**

The site footer says it is operated by Havenbyte LLC, which also runs the Modelflare API gateway that Castaly is built on. No address or registration details were found.

**Is there a subscription?**

No. The pricing page says there are no monthly fees, seats or commitments, and that the balance does not expire.

**How does Castaly relate to Modelflare?**

Castaly is the creative studio on the Modelflare gateway. Account, balance, API keys and usage history are shared.

**Can I use only the API?**

Yes. Create an API key through the Modelflare account and call the same models at the same public prices.

**How much does a video cost?**

It depends on model, resolution and duration. For example, Kling 2.6 at 720p std is listed at about $0.0382 per second, so a 5-second clip is roughly $0.19 before any request-specific multiplier.