vjepa2_ac_vit_giant_world_model(pretrained: bool | str = False, weights: VJEPA2ACWeights | None = None, overrides: object = {})V-JEPA 2-AC under Lucid's world-model task wrapper.
Model Size
Parameters
pretrainedbool or str= FalseTrue loads the Lucid-hosted official action checkpoint into the
wrapped model; a string selects a declared weight tag explicitly.Explicit weight enum member; takes precedence over
pretrained.**overridesobject= {}Optional
VJEPA2ACConfig field overrides.Returns
VJEPA2ACForWorldModelingThe same encoder and predictor as vjepa2_ac_vit_giant,
registered under the world-modeling task.
Notes
Reference: Assran et al., arXiv:2506.09985, 2025. The wrapper adds no
parameters; it exists so AutoModelForWorldModeling can reach the
family. Planning and controller search stay outside the model — the
forward is one teacher-forced latent transition.
Examples
>>> from lucid.models import AutoConfig
>>> config = AutoConfig.from_pretrained("vjepa2_ac_vit_giant_world_model")
>>> config.action_dim, config.state_dim
(7, 7)
>>> config.frame_causal, config.use_extrinsics
(True, False)