{
  "apiVersion": "v1",
  "methodology": "https://sourcescore.org/methodology/",
  "canonical": "https://sourcescore.org/claims/c6660e2e910f2680/",
  "claim": {
    "vertical": "ai-ml",
    "subject": "DeepSeek-R1",
    "predicate": "released_on",
    "object": "2025-01-20 with reasoning chain-of-thought capabilities",
    "confidence": 1,
    "sources": [
      {
        "url": "https://arxiv.org/abs/2501.12948",
        "title": "DeepSeek-R1: Incentivizing Reasoning Capability in LLMs via Reinforcement Learning",
        "publisher": "arXiv (DeepSeek-AI)",
        "publishedDate": "2025-01-22",
        "accessedDate": "2026-05-16",
        "type": "preprint",
        "excerpt": "We introduce our first-generation reasoning models, DeepSeek-R1-Zero and DeepSeek-R1. DeepSeek-R1-Zero, a model trained via large-scale reinforcement learning (RL) without supervised fine-tuning (SFT) as a preliminary step, demonstrates remarkable reasoning capabilities."
      },
      {
        "url": "https://api-docs.deepseek.com/news/news250120",
        "title": "DeepSeek-R1 Release",
        "publisher": "DeepSeek",
        "publishedDate": "2025-01-20",
        "accessedDate": "2026-05-16",
        "type": "official-blog"
      }
    ],
    "publishedAt": "2026-05-16T00:00:00Z",
    "lastVerified": "2026-05-16",
    "methodologyVersion": "veritas-v0.1",
    "tags": [
      "deepseek-r1",
      "deepseek",
      "reasoning",
      "reinforcement-learning",
      "chain-of-thought",
      "2025",
      "released_on"
    ],
    "id": "c6660e2e910f2680",
    "statement": "DeepSeek-R1 released on: 2025-01-20 with reasoning chain-of-thought capabilities."
  },
  "signature": {
    "algorithm": "HMAC-SHA256",
    "signedBy": "did:web:sourcescore.org",
    "signedAt": "2026-05-17T00:00:00.000Z",
    "signature": "4ba42b8252b80514498f9932a34ad4c0dc17d90ad72385a30f2dbfd03a9af50a"
  },
  "citedAs": "DeepSeek-R1 released on: 2025-01-20 with reasoning chain-of-thought capabilities. — SourceScore Claim c6660e2e910f2680 (verified 2026-05-16, signed 4ba42b82…). https://sourcescore.org/claims/c6660e2e910f2680/"
}