X-Mind: Efficient Visual Chain-of-Thought via Predictive World Model for End-to-End Driving

• URL: http://arxiv.org/abs/2606.28758v1
• Date: Sat, 27 Jun 2026 06:17:50 GMT
• Title: X-Mind: Efficient Visual Chain-of-Thought via Predictive World Model for End-to-End Driving
• Abstract summary: X-Mind is a framework that embeds forward-looking reasoning into autonomous driving policies.<n>By enforcing a world rollout prior to action, the model is constrained to imagine future evolution first.<n>X-Mind achieves competitive end-to-end driving performance on resource-constrained vehicle platforms.
• Score: 40.275378373130245
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Predicting future states is essential for autonomous agents, yet current Vision-Language-Action (VLA) models fundamentally lack this capability, relying instead on reactive perception-action mapping. While integrating Predictive World Models (PWMs) addresses this gap, existing approaches either incur prohibitive cascaded latency or act as shallow terminal tasks that fail to deeply embed forward-looking reasoning. To endow VLA models with this reasoning capability, we propose X-Mind. Rather than treating PWMs as an external auxiliary module, this framework internalizes them as the Visual Chain-of-Thought (Visual CoT). By enforcing a world rollout prior to action, the model is constrained to imagine future evolution first, yielding a driving policy that is robustly grounded in environmental dynamics and aware of the future consequences its actions will unfold. The challenge here is efficiency, and we tackle it on two fronts. First, we introduce a compact representation of visual thinking: an abstract sketch that fuses a Bird's-Eye-View (BEV) layout with abstract driving priors (e.g., navigation intents and traffic rules). Rather than rolling out dense future frames, the model reasons over this sketch as a mental canvas; aided by a Deep Compression Autoencoder (DC-AE), a 12-frame future rollout is reduced to merely 96 tokens, alleviating the long-context computational bottleneck. Second, to accelerate generation further, we propose a recurrent block diffusion scheme that unrolls the denoising steps across the layers of the large drive model, folding iterative refinement into the backbone's one forward pass. Trained and validated on large-scale real-world data, X-Mind achieves competitive end-to-end driving performance, which makes it a highly practical, low-latency solution that successfully deploys large-scale cognitive reasoning directly onto resource-constrained vehicle platforms.

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