{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:BLKXJ4BYHFWPBMJVWWOKX4WSR7","short_pith_number":"pith:BLKXJ4BY","canonical_record":{"source":{"id":"2603.24787","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-03-25T20:00:57Z","cross_cats_sorted":[],"title_canon_sha256":"d8f60aca720269f12c4d14ef388aa88f33a16f7fa1ae685d44203b05d9dbb75f","abstract_canon_sha256":"f21b97db2efaef4c94d063802aa341d7c32bcee326049582a23b2270ced15d5a"},"schema_version":"1.0"},"canonical_sha256":"0ad574f038396cf0b135b59cabf2d28fe7f679656510e5c82219f3e4c9b9ee7f","source":{"kind":"arxiv","id":"2603.24787","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.24787","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"arxiv_version","alias_value":"2603.24787v2","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.24787","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"pith_short_12","alias_value":"BLKXJ4BYHFWP","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"pith_short_16","alias_value":"BLKXJ4BYHFWPBMJV","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"pith_short_8","alias_value":"BLKXJ4BY","created_at":"2026-07-15T01:20:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:BLKXJ4BYHFWPBMJVWWOKX4WSR7","target":"record","payload":{"canonical_record":{"source":{"id":"2603.24787","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-03-25T20:00:57Z","cross_cats_sorted":[],"title_canon_sha256":"d8f60aca720269f12c4d14ef388aa88f33a16f7fa1ae685d44203b05d9dbb75f","abstract_canon_sha256":"f21b97db2efaef4c94d063802aa341d7c32bcee326049582a23b2270ced15d5a"},"schema_version":"1.0"},"canonical_sha256":"0ad574f038396cf0b135b59cabf2d28fe7f679656510e5c82219f3e4c9b9ee7f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-15T01:20:58.238930Z","signature_b64":"emvq7m+8M5E19mDzaQXnhNorDt0p/KjEnNwUUeoXCWDdZzdD6iFxkOpg+pGWmEeJAUKqip0HHi9V/qL79V43AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ad574f038396cf0b135b59cabf2d28fe7f679656510e5c82219f3e4c9b9ee7f","last_reissued_at":"2026-07-15T01:20:58.238095Z","signature_status":"signed_v1","first_computed_at":"2026-07-15T01:20:58.238095Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2603.24787","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-15T01:20:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"svZjAAZAdCkCeyZxMVY7T2MSZ2/1l2S3iotpYpWxD6e2+QpzPfpYVj+TaUnKdPeSOlls6ySUg1KgYBnMOV0eAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T14:53:24.942055Z"},"content_sha256":"23f779ac60962bee30be7e0706b17f76033298a0e8d6f0c59ba7612813c2e00a","schema_version":"1.0","event_id":"sha256:23f779ac60962bee30be7e0706b17f76033298a0e8d6f0c59ba7612813c2e00a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:BLKXJ4BYHFWPBMJVWWOKX4WSR7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ReLope: KL-Regularized LoRA Probes for Multimodal LLM Routing","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Blake JianHang Chen, Congchao Wang, Lu Lin, Yaopei Zeng","submitted_at":"2026-03-25T20:00:57Z","abstract_excerpt":"Routing has emerged as a promising strategy for balancing performance and cost in large language model (LLM) systems that combine lightweight models with powerful but expensive large models. Recent studies show that \\emph{probe routing}, which predicts the correctness of a small model using its hidden states, provides an effective solution in text-only LLMs. However, we observe that these probes degrade substantially when applied to multimodal LLMs (MLLMs). Through empirical analysis, we find that the presence of visual inputs weakens the separability of correctness signals in hidden states, m"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.24787","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.24787/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-15T01:20:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C9EZLznV+am78n7iIv4p4GP2gZjUBqtSXVyWT4BGy7GCoUkAkJG9+wWgEeSCvMXoy+JqRSCe7vXBIMXCNRNqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T14:53:24.942565Z"},"content_sha256":"7357e0a6af44469190ea0f11474feabb4a63b053a96c0cd8e02a4e3f05b700a3","schema_version":"1.0","event_id":"sha256:7357e0a6af44469190ea0f11474feabb4a63b053a96c0cd8e02a4e3f05b700a3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7/bundle.json","state_url":"https://pith.science/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-03T14:53:24Z","links":{"resolver":"https://pith.science/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7","bundle":"https://pith.science/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7/bundle.json","state":"https://pith.science/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BLKXJ4BYHFWPBMJVWWOKX4WSR7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:BLKXJ4BYHFWPBMJVWWOKX4WSR7","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"f21b97db2efaef4c94d063802aa341d7c32bcee326049582a23b2270ced15d5a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-03-25T20:00:57Z","title_canon_sha256":"d8f60aca720269f12c4d14ef388aa88f33a16f7fa1ae685d44203b05d9dbb75f"},"schema_version":"1.0","source":{"id":"2603.24787","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2603.24787","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"arxiv_version","alias_value":"2603.24787v2","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2603.24787","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"pith_short_12","alias_value":"BLKXJ4BYHFWP","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"pith_short_16","alias_value":"BLKXJ4BYHFWPBMJV","created_at":"2026-07-15T01:20:58Z"},{"alias_kind":"pith_short_8","alias_value":"BLKXJ4BY","created_at":"2026-07-15T01:20:58Z"}],"graph_snapshots":[{"event_id":"sha256:7357e0a6af44469190ea0f11474feabb4a63b053a96c0cd8e02a4e3f05b700a3","target":"graph","created_at":"2026-07-15T01:20:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2603.24787/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Routing has emerged as a promising strategy for balancing performance and cost in large language model (LLM) systems that combine lightweight models with powerful but expensive large models. Recent studies show that \\emph{probe routing}, which predicts the correctness of a small model using its hidden states, provides an effective solution in text-only LLMs. However, we observe that these probes degrade substantially when applied to multimodal LLMs (MLLMs). Through empirical analysis, we find that the presence of visual inputs weakens the separability of correctness signals in hidden states, m","authors_text":"Blake JianHang Chen, Congchao Wang, Lu Lin, Yaopei Zeng","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-03-25T20:00:57Z","title":"ReLope: KL-Regularized LoRA Probes for Multimodal LLM Routing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.24787","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:23f779ac60962bee30be7e0706b17f76033298a0e8d6f0c59ba7612813c2e00a","target":"record","created_at":"2026-07-15T01:20:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"f21b97db2efaef4c94d063802aa341d7c32bcee326049582a23b2270ced15d5a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.AI","submitted_at":"2026-03-25T20:00:57Z","title_canon_sha256":"d8f60aca720269f12c4d14ef388aa88f33a16f7fa1ae685d44203b05d9dbb75f"},"schema_version":"1.0","source":{"id":"2603.24787","kind":"arxiv","version":2}},"canonical_sha256":"0ad574f038396cf0b135b59cabf2d28fe7f679656510e5c82219f3e4c9b9ee7f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ad574f038396cf0b135b59cabf2d28fe7f679656510e5c82219f3e4c9b9ee7f","first_computed_at":"2026-07-15T01:20:58.238095Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-15T01:20:58.238095Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"emvq7m+8M5E19mDzaQXnhNorDt0p/KjEnNwUUeoXCWDdZzdD6iFxkOpg+pGWmEeJAUKqip0HHi9V/qL79V43AA==","signature_status":"signed_v1","signed_at":"2026-07-15T01:20:58.238930Z","signed_message":"canonical_sha256_bytes"},"source_id":"2603.24787","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:23f779ac60962bee30be7e0706b17f76033298a0e8d6f0c59ba7612813c2e00a","sha256:7357e0a6af44469190ea0f11474feabb4a63b053a96c0cd8e02a4e3f05b700a3"],"state_sha256":"d7c4c358c19b4d40bea2a2a41391177b412a4d2cfbbf98e6290bf3cd260054ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EvAon4Aj41pY2Fr7qoep1+EOiP6k91FwQGC+0+fE1/e3se/Rzf+LP8BZcLxKReLn8092pEiq/wfNyLGYQA6zDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T14:53:24.947988Z","bundle_sha256":"d458542aac01962632a9e40ace9bf2cb95aa1d20301d159be3464ae77fc7f225"}}