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    "story_id": "mp-2026-10-18-006",
    "source_story_id": "tmp-story-mirrormoe-routing-exploration",
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    "headline": "Shared Experts Can Quiet the Router Too Much",
    "slug": "shared-experts-can-quiet-the-router-too-much",
    "dek": "MirrorMoE suppresses unnecessary experts per token to recover exploration lost when shared experts flatten routing signals.",
    "summary": "MirrorMoE suppresses unnecessary experts per token to recover exploration lost when shared experts flatten routing signals.",
    "body_text": "Fine-grained mixture-of-experts models offer many possible expert combinations, but shared experts can reduce variation in token representations and make the router explore less of that larger space. MirrorMoE addresses the mismatch by shrinking the useful search space rather than simply adding noise: it suppresses unnecessary experts for each token so the router can focus on plausible combinations. The authors report consistent performance improvements across tested model scales. The abstract does not quantify every gain or establish that shared experts are broadly harmful; the contribution is a diagnosis of how two common design choices can work against one another.",
    "why_it_matters": "MirrorMoE suppresses unnecessary experts per token to recover exploration lost when shared experts flatten routing signals.",
    "limitations": [
      "The abstract does not quantify every gain or establish that shared experts are broadly harmful; the contribution is a diagnosis of how two common design choices can work against one another."
    ],
    "importance": 7,
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    "first_published_at": "2026-10-18T09:00:00.000-04:00",
    "modified_at": "2026-10-18T09:00:00.000-04:00",
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        "text": "MirrorMoE suppresses unnecessary experts per token to recover exploration lost when shared experts flatten routing signals.",
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        "qualification": "The abstract does not quantify every gain or establish that shared experts are broadly harmful; the contribution is a diagnosis of how two common design choices can work against one another."
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    "source_ids": [
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    "tags": [
      "mixture of experts",
      "routing",
      "model architecture"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-10-18-006",
      "title": "arXiv preprint 2610.22353, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2610.22353v1",
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      "published_at": "2026-10-15T13:58:02.000-04:00",
      "accessed_at": "2026-10-18T08:23:52.920-04:00",
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  "publisher": {
    "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": "Shared Experts Can Quiet the Router Too Much",
    "publisher": "The Machine Press",
    "published_at": "2026-10-18T09:00:00.000-04:00",
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