# DreamX-World-5B API

> DreamX-World-5B as a hosted realtime API. A controllable world rollout on main_video. $0.0023 per billable second.

Source: https://windflow.online/models/dreamx-world-5b · Navigable world model · Windflow Labs

## What it is

DreamX-World is a general-purpose interactive world model from Alibaba's AMAP research team. DreamX-World-5B, built on a Wan2.2-TI2V backbone, is served on Windflow as a portrait-format controllable world rollout driven by a seed image, a text prompt and movement and camera-control state.

## Specifications

- **Architecture:** 5B controllable world generation model (Wan2.2-TI2V backbone)
- **Resolution:** 704 × 1280 portrait in the production runtime; negotiated per session
- **Chunk:** Action-sequence conditioned rollout
- **Inputs:** A seed image, a text prompt, and movement/camera-control state
- **Outputs:** A controllable world rollout on main_video
- **Delivery:** WebSocket (H.264) · WebRTC
- **Session protocol:** sdk.realtime.v2
- **Price:** $0.0023 per billable second

## Pricing

$0.0023 per billable session-second ($8.28/hr of billable time). Billing starts at the session's first generation_started event and stops when the session is released or ends. Queueing, worker startup, time before generation starts and the documented reconnect grace are not billed. After generation starts, paused or unwatched time remains billable; release the owner session to stop the meter.

## Use cases

- Portrait-format interactive worlds for mobile-first experiences.
- Prompt-and-action controlled scene rollouts from a single image.
- Short controllable scenes for storyboarding and previsualisation.
- Evaluating a 5B world model against larger alternatives.

## Where it comes from

- [AMAP-ML/DreamX-World on GitHub](https://github.com/AMAP-ML/DreamX-World) — Apache-2.0

## FAQ

### What orientation does DreamX-World-5B produce?

Portrait, at 704 × 1280 in the production runtime; the exact size is negotiated per session.

### How do controls reach the model?

Movement and camera state are sampled into the next action sequence, so a control change takes effect at the next rollout rather than on the very next frame.

### How much does DreamX-World-5B cost on Windflow?

DreamX-World-5B costs $0.0023 per billable session-second ($8.28/hr of billable time). Billing starts at the session's first generation_started event and stops when the session is released or ends. Queueing, worker startup, time before generation starts and the documented reconnect grace are not billed. After generation starts, paused or unwatched time remains billable; release the owner session to stop the meter. There is no subscription.

### How do I get access to DreamX-World-5B?

Windflow is in private beta. Request access from the sign-up page, or ask for a live demo of DreamX-World-5B. Approved accounts start with $5 and four concurrent sessions.

### Is DreamX-World-5B always running?

No. Model capacity is brought up on demand rather than kept standing. Live readiness for each model is published at api.windflow.online/v1/status, and a live demo can be arranged on request.

## Related guides

- [Choosing a realtime video model: a decision guide for 12 hosted models](https://windflow.online/guides/choosing-a-realtime-video-model)
- [World model API: embed a navigable AI world in your app](https://windflow.online/guides/world-model-api)
- [How to use the DreamX World API](https://windflow.online/guides/dreamx-world-api)
- [World model seed images and prompts: a practical guide](https://windflow.online/guides/world-model-seed-images-and-prompts)
- [What is a world model? How it differs from video generation](https://windflow.online/guides/what-is-a-world-model)