Pith Number

pith:5W4D6FR2

pith:2025:5W4D6FR2F6EY7OEVDSZSOUFIY6

not attested not anchored not stored refs pending

How Robust Are Router-LLMs? Analysis of the Fragility of LLM Routing Capabilities

Aly M. Kassem, Bernhard Sch\"olkopf, Zhijing Jin

arxiv:2504.07113 v1 · 2025-03-20 · cs.CL · cs.DB

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5W4D6FR2F6EY7OEVDSZSOUFIY6}

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

3 papers in Pith

SWE-Router: Routing in Multi-turn Agentic Software Engineering Tasks

From Sampled Outcomes to Capability Distributions: Rethinking Supervision for LLM Routing

Route to Rome Attack: Directing LLM Routers to Expensive Models via Adversarial Suffix Optimization

Receipt and verification

First computed	2026-07-05T10:47:03.491948Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edb83f163a2f898fb8951cb32750a8c7883345e0014b3a7cf316746b2304c14b

Aliases

arxiv: 2504.07113 · arxiv_version: 2504.07113v1 · doi: 10.48550/arxiv.2504.07113 · pith_short_12: 5W4D6FR2F6EY · pith_short_16: 5W4D6FR2F6EY7OEV · pith_short_8: 5W4D6FR2

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/5W4D6FR2F6EY7OEVDSZSOUFIY6 \
  | 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: edb83f163a2f898fb8951cb32750a8c7883345e0014b3a7cf316746b2304c14b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f2be22fe3fbdf63067f57c4aec711c6d3c9e233cce7bb2e563ade0ba4e66a55",
    "cross_cats_sorted": [
      "cs.DB"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-03-20T19:52:30Z",
    "title_canon_sha256": "7bbc66c47a0b6ffce0de916ce87e24e92980c416fd1a81e85821a2b7f760fd8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.07113",
    "kind": "arxiv",
    "version": 1
  }
}