Pith Number

pith:MBLRERJ4

pith:2026:MBLRERJ4YVQ4HQJQF5SRE4G7EC

not attested not anchored not stored refs pending

R2-Router: A New Paradigm for LLM Routing with Reasoning

Heng Huang, Jiaqi Xue, Jiarong Xing, Qian Lou

arxiv:2602.02823 v2 · 2026-02-02 · 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{MBLRERJ4YVQ4HQJQF5SRE4G7EC}

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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

4 papers in Pith

The Workload-Router-Pool Architecture for LLM Inference Optimization: A Vision Paper from the vLLM Semantic Router Project

LatentRouter: Can We Choose the Right Multimodal Model Before Seeing Its Answer?

Switchcraft: AI Model Router for Agentic Tool Calling

SecureRouter: Encrypted Routing for Efficient Secure Inference

Receipt and verification

First computed	2026-06-02T01:03:42.129374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

605712453cc561c3c1302f651270df208b071b3645a9d9aeeb1c2b16e142d838

Aliases

arxiv: 2602.02823 · arxiv_version: 2602.02823v2 · doi: 10.48550/arxiv.2602.02823 · pith_short_12: MBLRERJ4YVQ4 · pith_short_16: MBLRERJ4YVQ4HQJQ · pith_short_8: MBLRERJ4

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/MBLRERJ4YVQ4HQJQF5SRE4G7EC \
  | 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: 605712453cc561c3c1302f651270df208b071b3645a9d9aeeb1c2b16e142d838

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5ad057b7edc2195784333699e5619c8d8ef0a9446ecb5b84125f6a9214a9571",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-02-02T21:23:51Z",
    "title_canon_sha256": "19266a8c3558c3c86daf29761367733e7739e3b82c699ea73dcc69252d4223de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.02823",
    "kind": "arxiv",
    "version": 2
  }
}