Pith Number

pith:GCYLMTTF

pith:2024:GCYLMTTF2KVMBR6CHH7YNLNDMH

not attested not anchored not stored refs pending

Model Equality Testing: Which Model Is This API Serving?

Carlos Guestrin, Irena Gao, Percy Liang

arxiv:2410.20247 v2 · 2024-10-26 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GCYLMTTF2KVMBR6CHH7YNLNDMH}

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.

Cited by

5 papers in Pith

FLIPS: Instance-Fingerprinting for LLMs via Pseudo-random Sequences

KBF: Knowledge Boundary as Fingerprint for Language Model and Black-Box API Auditing

When Is the Same Model Not the Same Service? A Measurement Study of Hosted Open-Weight LLM APIs

Rewriting the Response Path: Silent Tampering and Provider-Signed Defense in BYOK LLM Agents

Receipt and verification

First computed	2026-07-05T10:46:21.127025Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

30b0b64e65d2aac0c7c239ff86ada361ebc95409937e89d450539094a4a049aa

Aliases

arxiv: 2410.20247 · arxiv_version: 2410.20247v2 · doi: 10.48550/arxiv.2410.20247 · pith_short_12: GCYLMTTF2KVM · pith_short_16: GCYLMTTF2KVMBR6C · pith_short_8: GCYLMTTF

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/GCYLMTTF2KVMBR6CHH7YNLNDMH \
  | 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: 30b0b64e65d2aac0c7c239ff86ada361ebc95409937e89d450539094a4a049aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30a431cc25efbef961b809f690ba7a42e1401be7a344fc2be062bf0fed9c3689",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2024-10-26T18:34:53Z",
    "title_canon_sha256": "33742cb8b516a202c9c725709daeaaccbd4612896670b315a1c69315d00d2084"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2410.20247",
    "kind": "arxiv",
    "version": 2
  }
}