RLDX-1-VLM is the vision-language backbone used by the RLDX-1 robot policy family. It is a Qwen3-VL-8B-Instruct checkpoint distributed separately from the action policy so that researchers can inspect, finetune, or replace the perceptual stack independently.

Note. This checkpoint exposes a standard Qwen3-VL VLM interface only — it does not ship the Multi-Stream Action Transformer head, the cognition tokens, the memory / motion / physics modules, or the RLDX inference server. For action prediction, use one of the RLDX-1-PT, RLDX-1-FT-*, or RLDX-1-MT-* checkpoints.

Intended use

As the --backbone-path for finetuning a fresh RLDX-1 policy (recipe).
For VLM-only ablations, dense-captioning experiments, or perceptual probing within the RLDX research stack.

Quick start

python

from transformers import AutoModelForImageTextToText, AutoProcessor

model = AutoModelForImageTextToText.from_pretrained(
    "RLWRLD/RLDX-1-VLM",
    torch_dtype="bfloat16",
    device_map="cuda:0",
)
processor = AutoProcessor.from_pretrained("RLWRLD/RLDX-1-VLM")

Model details

Type: Vision-language model (multimodal text + image / video).
Backbone: Qwen/Qwen3-VL-8B-Instruct.
Params: 8B.
Role in RLDX-1: perceptual encoder for the MSAT action policy. Cognition tokens are injected into this backbone and routed through Qwen3-VL hidden states to produce a compact perceptual summary consumed by the action model.

For a full architectural walkthrough including how cognition tokens are wired into this backbone, see docs/architecture.md.

Limitations

RLDX-1-VLM is a research backbone snapshot. It is not safety-tuned beyond its Qwen3-VL upstream, and it is not intended as a general-purpose chat assistant. For action prediction it must be paired with the RLDX-1 policy head; the standalone VLM does not produce robot commands.

Citation

bibtex

@article{rldx2026,
  title={RLDX-1 Technical Report},
  author={Kim, Dongyoung and Jang, Huiwon and Koo, Myungkyu and Jang, Suhyeok and Kim, Taeyoung and others},
  year={2026},
  note={RLWRLD},
  eprint={2605.03269},
  archivePrefix={arXiv},
  url={https://arxiv.org/abs/2605.03269}
}

License

Released under the RLWRLD Model License v1.0 — a non-commercial license with attribution and share-alike requirements. See LICENSE.md for the full text. By using this model you agree to those terms, including the use restrictions in §3.5.