Pith Number

pith:5CTSE3WS

pith:2025:5CTSE3WST6I6DAP4H676JBEBXT

not attested not anchored not stored refs pending

A Head to Predict and a Head to Question: Pre-trained Uncertainty Quantification Heads for Hallucination Detection in LLM Outputs

Akim Tsvigun, Artem Shelmanov, Artem Vazhentsev, Caiqi Zhang, Ekaterina Fadeeva, Igor Kiselev, Ivan Tsvigun, Mrinmaya Sachan, Nico Daheim, Preslav Nakov, Timothy Baldwin, Zhuohan Xie

arxiv:2505.08200 v1 · 2025-05-13 · cs.CL · cs.AI

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5CTSE3WST6I6DAP4H676JBEBXT}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T11:02:26.388328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8a7226ed29f91e181fc3fbfe48481bcdef99ebe328fd70fbd312c2bec4d4f84

Aliases

arxiv: 2505.08200 · arxiv_version: 2505.08200v1 · doi: 10.48550/arxiv.2505.08200 · pith_short_12: 5CTSE3WST6I6 · pith_short_16: 5CTSE3WST6I6DAP4 · pith_short_8: 5CTSE3WS

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/5CTSE3WST6I6DAP4H676JBEBXT \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e8a7226ed29f91e181fc3fbfe48481bcdef99ebe328fd70fbd312c2bec4d4f84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c08c96ee020c046b97f314868e07fc3ea70dbcef05afd18d96c97ab97cdd3a33",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-05-13T03:30:26Z",
    "title_canon_sha256": "f4a647ec692848eb57b756f619a738b56524e15be25819bfdf7a1b9febe8d2a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.08200",
    "kind": "arxiv",
    "version": 1
  }
}