AOpen
SkyReels V2
Skywork AI
First open model for infinite-length video. Best human rendering in open source.
AOpen
LTX-2
Lightricks
The predecessor to 2.3. 19B params, native 4K + audio, 30 camera moves. Still excellent and widely deployed.
Pick SkyReels V2 if…
You want long-form AI films, human-centric content, or short films and ads.
Pick LTX-2 if…
You want production video pipelines, camera-controlled generation, or depth/pose-driven workflows.
Specifications
Maker
Skywork AI
Lightricks
Source Type
Open Source
Open Source
License
Open Source
Apache 2.0 (<$10M rev)
Architecture
AR Diffusion-Forcing
DiT + 3D Causal VAE
Parameters
14B
19B (14B video + 5B audio)
Max Resolution
720p
4K
Max Duration
30s+ (infinite)
20s
FPS
24
Up to 50
Native Audio
No
Yes
ComfyUI Support
No
Yes
Fine-tunable
Yes
Yes
Min VRAM
40GB+ (A100/H100)
12GB+ (distilled) / 24GB+ (full)
Cost / Second
Self-host
$0.04
Inputs
T2V, I2V
T2V, I2V, V2V, Audio-to-Video, Depth, OpenPose, Camera Control
On Floyo
No
Yes
Strengths & Trade-offs
SkyReels V2
Strengths
- +First infinite-length open model
- +10M+ film/TV training
- +best open human faces
Trade-offs
- -Heavy GPU req
- -no ComfyUI
- -newer community
- -720p cap
Best For
- →Long-form AI films
- →human-centric content
- →short films and ads
LTX-2
Strengths
- +19B params (14B video + 5B audio)
- +native 4K at 50fps
- +first open model with unified audio-video
- +30 cinematic camera moves
- +depth-aware generation
Trade-offs
- -Superseded by 2.3 on detail and audio quality
- -LoRAs not compatible with 2.3
- -texture drift every 8-10 frames
- -in-scene text issues
Best For
- →Production video pipelines
- →camera-controlled generation
- →depth/pose-driven workflows
- →budget 4K content