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    "story_id": "mp-2026-08-10-003",
    "source_story_id": "tmp-story-simwam-driving-video-teacher",
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    "headline": "The Driving Model Left Its Video Teacher Behind",
    "slug": "the-driving-model-left-its-video-teacher-behind",
    "dek": "SimWAM uses a video generator only during training, then discards it so a smaller action model can plan trajectories on its own.",
    "summary": "SimWAM uses a video generator only during training, then discards it so a smaller action model can plan trajectories on its own.",
    "body_text": "SimWAM co-trains a pretrained video expert and a lightweight action expert through a shared attention interface, while masking future frames from the action branch. At inference, the video branch is removed. The authors report a 91.5 PDMS score on NAVSIM, lower latency than compared world-action planners and zero-shot transfer to nuScenes. These are benchmark results from a preprint, not evidence of road-ready autonomous driving.",
    "why_it_matters": "SimWAM uses a video generator only during training, then discards it so a smaller action model can plan trajectories on its own.",
    "limitations": [
      "These are benchmark results from a preprint, not evidence of road-ready autonomous driving."
    ],
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    "first_published_at": "2026-08-10T09:00:00.000-04:00",
    "modified_at": "2026-08-10T15:50:00.000-04:00",
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        "text": "SimWAM uses a video generator only during training, then discards it so a smaller action model can plan trajectories on its own.",
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        "qualification": "These are benchmark results from a preprint, not evidence of road-ready autonomous driving."
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    "tags": [
      "autonomous driving",
      "world models",
      "video generation",
      "planning"
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  "sources": [
    {
      "source_id": "source-2026-08-10-003",
      "title": "arXiv preprint 2608.07468",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.07468",
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      "published_at": "2026-08-07T13:00:00.000-04:00",
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    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "The Driving Model Left Its Video Teacher Behind",
    "publisher": "The Machine Press",
    "published_at": "2026-08-10T09:00:00.000-04:00",
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