Pith Number

pith:XPOPNTEV

pith:2026:XPOPNTEV3LWXOC2AY4GPYYGIZ4

not attested not anchored not stored refs pending

It's Not the Capability: Harness Sensitivity Is Non-Monotone Across LLM Agent Tiers

Yong-eun Cho

arxiv:2605.26731 v1 · 2026-05-26 · cs.AI · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XPOPNTEV3LWXOC2AY4GPYYGIZ4}

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	2026-05-27T01:06:09.751927Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bbdcf6cc95daed770b40c70cfc60c8cf2c03008b3c19ad8039a9478e34d513e5

Aliases

arxiv: 2605.26731 · arxiv_version: 2605.26731v1 · doi: 10.48550/arxiv.2605.26731 · pith_short_12: XPOPNTEV3LWX · pith_short_16: XPOPNTEV3LWXOC2A · pith_short_8: XPOPNTEV

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/XPOPNTEV3LWXOC2AY4GPYYGIZ4 \
  | 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: bbdcf6cc95daed770b40c70cfc60c8cf2c03008b3c19ad8039a9478e34d513e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9b4eb96904cf85dd25f5a466d8df0287b427604fdd03814ac9fd18e141b20d2",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-05-26T09:08:41Z",
    "title_canon_sha256": "ba19b8d004a0eea5cccb2998c3d637048109b8cf7b16ab9e52cf530243b737aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.26731",
    "kind": "arxiv",
    "version": 1
  }
}