Pith Number

pith:RA6IRTQF

pith:2025:RA6IRTQF4EHGDCTX7KIIXZYAXV

not attested not anchored not stored refs pending

LEGO-Puzzles: How Good Are MLLMs at Multi-Step Spatial Reasoning?

Haodong Duan, Junyao Gao, Kai Chen, Kaifeng Lyu, Kexian Tang, Wenran Liu, Yanan Sun, Yanhong Zeng, Zhening Xing

arxiv:2503.19990 v3 · 2025-03-25 · 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{RA6IRTQF4EHGDCTX7KIIXZYAXV}

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

10 papers in Pith

Vesta: A Generalist Embodied Reasoning Model

The Periodic Table of LLM Reasoning: A Structured Survey of Reasoning Paradigms, Methods, and Failure Modes

Seeing Time: Benchmarking Chronological Reasoning and Shortcut Biases in Vision-Language Models

Brick-Composer: Using MLLMs for Assembly with Diverse Bricks

Sample-Efficient Post-Training for LEGO Spatial-Physics Reasoning

Receipt and verification

First computed	2026-07-05T11:24:17.006458Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

883c88ce05e10e618a77fa908be700bd69f7ecfd89fb7488546e6752c9cefdd2

Aliases

arxiv: 2503.19990 · arxiv_version: 2503.19990v3 · doi: 10.48550/arxiv.2503.19990 · pith_short_12: RA6IRTQF4EHG · pith_short_16: RA6IRTQF4EHGDCTX · pith_short_8: RA6IRTQF

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/RA6IRTQF4EHGDCTX7KIIXZYAXV \
  | 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: 883c88ce05e10e618a77fa908be700bd69f7ecfd89fb7488546e6752c9cefdd2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b8d7b71ff4fdd02e8868e3ff3904f458f0860e3b9f129e0e8533a764ce9c15ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2025-03-25T18:21:07Z",
    "title_canon_sha256": "08b9fa440c21f5aa9aaafecb094f5138390c5412791bff9bb0db47ef42c0f191"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.19990",
    "kind": "arxiv",
    "version": 3
  }
}