{
  "id": 9243497,
  "title": "PACT: From Credit Assignment to Critic Alignment",
  "url": "https://urgent.news/2026/09/22/pact-from-credit-assignment-to-critic-alignment",
  "topic": "ai",
  "section": "AI",
  "published": "2026-09-22T12:58:28.000Z",
  "source": {
    "name": "arXiv cs.AI",
    "slug": "arxiv-cs-ai",
    "url": "https://arxiv.org/abs/2609.26355v1"
  },
  "original_language": "en",
  "account": null,
  "summary": "Reinforcement learning has become a central component of large language model (LLM) post-training, yet token-level credit lacks a generally accepted mathematical definition, leaving its relationship to commonly used training signals unclear. We formulate three regularity conditions, namely Completeness, Prefix Consistency, and Neutrality, and prove that they uniquely determine token-level credit.…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}