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    "story_id": "mp-2026-10-20-017",
    "source_story_id": "tmp-brief-soma-reasoning-monitor",
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    "headline": "A Fast Monitor Interrupts the Slow Reasoner",
    "slug": "a-fast-monitor-interrupts-the-slow-reasoner",
    "dek": "SOMA watches a reasoning trace, warns first and takes over only when a named failure persists.",
    "summary": "SOMA watches a reasoning trace, warns first and takes over only when a named failure persists.",
    "body_text": "SOMA pairs a fast decision model with a slower reasoner through scenarios, continuous judgments and predefined interventions. Without task-specific training, the shared monitor cut reasoning tokens by as much as 36 percent while improving average accuracy on overthinking tests, and raised abstention on unanswerable questions from 70.5 to 87.2 percent. It depends on visible text and calibrated monitors; it is not oversight of hidden reasoning.",
    "why_it_matters": "SOMA watches a reasoning trace, warns first and takes over only when a named failure persists.",
    "limitations": [
      "It depends on visible text and calibrated monitors; it is not oversight of hidden reasoning."
    ],
    "importance": 7,
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    "first_published_at": "2026-10-20T09:00:00.000-04:00",
    "modified_at": "2026-10-20T09:00:00.000-04:00",
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        "qualification": "It depends on visible text and calibrated monitors; it is not oversight of hidden reasoning."
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    "tags": [
      "reasoning",
      "monitoring",
      "abstention"
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    "image_url": null,
    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-10-20-019",
      "title": "arXiv preprint 2610.26793, original v1",
      "publisher": "arXiv",
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      "published_at": "2026-10-19T13:40:21.000-04:00",
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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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    "title": "A Fast Monitor Interrupts the Slow Reasoner",
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