NoRD-Base: A Data-Efficient Vision-Language-Action Model that Drives without Reasoning (SFT only)

CVPR 2026 | arXiv | Project Page | GitHub

Ishaan Rawal · Shubh Gupta · Yihan Hu · Wei Zhan

This is the SFT-only ablation baseline from the paper: Qwen2.5-VL-3B supervised fine-tuned to directly predict driving trajectories as discrete tokens without chain-of-thought reasoning, using 3× fewer tokens than reasoning-based VLA baselines. This checkpoint is also the initialization used for the Dr. GRPO stage that produces the paper's main result.

Model Training NAVSIM PDMS
nord SFT + Dr. GRPO 0.8626
nord-base (this repo) SFT only 0.7273

Usage

Install the nord client and serve with vLLM:

vllm serve AppliedIntuitionResearch/nord-base --served-model-name qwen --dtype bfloat16 --port 8000
from PIL import Image
import nord

agent = nord.NordAgent.from_pretrained("nord-base")

output = agent.predict(nord.NordInput(
    cameras=[Image.open("fl.jpg"), Image.open("front.jpg"), Image.open("fr.jpg")],
    ego_velocity_ms=(8.3, 0.0),
    driving_command="straight",
))

print(output.trajectory.shape)   # (40, 3) — x, y, heading at 10 Hz, 4 seconds

Full inference and NAVSIM evaluation instructions: github.com/Applied-Intuition-Open-Source/nord.

This repo bundles the K-Disc trajectory tokenizer vocab (vocab.pkl, 2048 clusters) used to decode the model's output tokens into (x, y, heading) trajectories.

Citation

@inproceedings{rawal2026nord,
  title={NoRD: A Data-Efficient Vision-Language-Action Model that Drives without Reasoning},
  author={Rawal, Ishaan and Gupta, Shubh and Hu, Yihan and Zhan, Wei},
  booktitle={Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
  year={2026}
}

License

This checkpoint is released under CC BY-NC-SA 4.0 (non-commercial). The nord inference client code is separately licensed under Apache 2.0 — see github.com/Applied-Intuition-Open-Source/nord.

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