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    "story_id": "mp-2026-09-01-019",
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    "headline": "Two Million Parameters Read the Verification Signal Already Inside",
    "slug": "two-million-parameters-read-the-verification-signal-already-inside",
    "dek": "HSRM ranks candidate math solutions from frozen-generator hidden states instead of re-reading their full text.",
    "summary": "HSRM ranks candidate math solutions from frozen-generator hidden states instead of re-reading their full text.",
    "body_text": "Across four math benchmarks, the hidden-state verifier matched or beat a 55-million-parameter text energy model in 15 of 16 generator-dataset settings while using about two million parameters. It relies on access to the generator's internal representations.",
    "why_it_matters": "HSRM ranks candidate math solutions from frozen-generator hidden states instead of re-reading their full text.",
    "limitations": [],
    "importance": 7,
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    "first_published_at": "2026-09-01T09:00:00.000-04:00",
    "modified_at": "2026-09-01T09:00:00.000-04:00",
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        "text": "HSRM ranks candidate math solutions from frozen-generator hidden states instead of re-reading their full text.",
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        "qualification": null
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    "source_ids": [
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    "tags": [
      "reward models",
      "hidden states",
      "math reasoning"
    ],
    "image_url": null,
    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-09-01-021",
      "title": "arXiv preprint 2608.30841",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.30841",
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      "source_type": "primary_research",
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      "published_at": "2026-08-31T10:12:19.000-04:00",
      "accessed_at": "2026-09-01T08:25:35.000-04:00",
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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": "Two Million Parameters Read the Verification Signal Already Inside",
    "publisher": "The Machine Press",
    "published_at": "2026-09-01T09:00:00.000-04:00",
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