---
title: "Astra"
description: "Wan2.1-1.3B interactive world with camera actions. Official garden_1 Sekai demo is runner-verified: 832×480, 97 frames, 20 fps. Apache-2.0 bases."
modelId: "astra"
pageSource: authored
---

Astra is an **interactive world model** on a Wan2.1 backbone: one image plus camera actions roll out navigable world video. WorldFoundry vendors the infer-only runtime under `worldfoundry/synthesis/visual_generation/kling/astra_runtime` and exposes it as `AstraPipeline`. Studio defaults mirror the official Wan2.1-backed **Sekai** image rollout.

<ModelPaperFigures modelId="astra" locale="en" />

The official paper is [Astra: General Interactive World Model with Autoregressive Denoising](https://arxiv.org/abs/2512.08931) (ICLR 2026, arXiv 2512.08931). Project: [eternalevan.github.io/Astra-project](https://eternalevan.github.io/Astra-project/). Code: [EternalEvan/Astra](https://github.com/EternalEvan/Astra). Weights: `EvanEternal/Astra` (mirror `KwaiVGI/Astra`) plus `Wan-AI/Wan2.1-T2V-1.3B`. Recorded license on those bases: **apache-2.0**. Publishing institution is not recorded here.

Runner parity is **verified**: the official **garden_1** Sekai demo ran through the in-tree Studio/API path with `forward_left` camera control and emitted **97 frames at 832×480, 20 fps**.

<ModelCommandBuilder modelId="astra" locale="en" />

## What it is for

Astra world / video route as recorded.

Launch `worldfoundry-eval run astra` with `--pipeline.task-profile official-sekai-image`.

Score on [CameraBench](/docs/evaluation/benchmark-hub/camerabench) — camera-following accuracy of interactive rollouts.

## Runtime contract

Required: `prompt` and `image`; optional: `video`; `actions`: camera_direction; artifacts: `astra.mp4`.

| Knob | Verified demo |
| --- | --- |
| Size | **832×480** |
| Frames | **97** |
| FPS | **20** |
| Camera | `forward_left` on garden_1 |

## Run in WorldFoundry

Status: **Verified**. Unified environment `worldfoundry-unified-cu128` (Python 3.11, CUDA 12.8). Stage `EvanEternal/Astra`, `Wan-AI/Wan2.1-T2V-1.3B`, and `EvanEternal/Astra` among others locally — missing files fail at load, nothing is downloaded. Run `worldfoundry-eval run astra` with `--pipeline.task-profile official-sekai-image`. Catalog VRAM is unset.

<ModelRelatedRecipes modelId="astra" locale="en" />