{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:EMWIP24X44BIE7PTESGKP6MPPI","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":"ad567d34cc69f917f8eaa80a284be474af6cbdb04aab95f3c5ba0915ad1d23a3","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-04-24T17:00:53Z","title_canon_sha256":"fcaa1e155e8da08bdb29158ea7f06cb86fce10519c2e887483704800816dda8c"},"schema_version":"1.0","source":{"id":"2607.11889","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.11889","created_at":"2026-07-15T00:21:21Z"},{"alias_kind":"arxiv_version","alias_value":"2607.11889v1","created_at":"2026-07-15T00:21:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.11889","created_at":"2026-07-15T00:21:21Z"},{"alias_kind":"pith_short_12","alias_value":"EMWIP24X44BI","created_at":"2026-07-15T00:21:21Z"},{"alias_kind":"pith_short_16","alias_value":"EMWIP24X44BIE7PT","created_at":"2026-07-15T00:21:21Z"},{"alias_kind":"pith_short_8","alias_value":"EMWIP24X","created_at":"2026-07-15T00:21:21Z"}],"graph_snapshots":[{"event_id":"sha256:061a3e18c9c9979c3b881e1b02cfc92c20704531d03396dba8d6683df147b91d","target":"graph","created_at":"2026-07-15T00:21:21Z","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/2607.11889/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Large language models trained on unrestricted internet corpora inevitably embed information from the future, introducing lookahead bias that compromises the validity of backtests and causal inference in finance and the social sciences. Point-in-time language models--trained exclusively on text available up to each calendar date--eliminate this leakage by construction, but existing efforts typically produce models that lag substantially behind their unconstrained counterparts. We show that this performance gap can be substantially narrowed through scale. Training decoder-only transformers with ","authors_text":"Bryan Kelly, Johannes Schwab, Semyon Malamud, Teng Andrea Xu","cross_cats":["cs.AI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-04-24T17:00:53Z","title":"Scaling Point-in-Time Language Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.11889","kind":"arxiv","version":1},"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":"sha256:03c3f39f2ccd03cfaf99c457764c13971d9986da4ac38ca5d61933437a91622e","target":"record","created_at":"2026-07-15T00:21:21Z","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":"ad567d34cc69f917f8eaa80a284be474af6cbdb04aab95f3c5ba0915ad1d23a3","cross_cats_sorted":["cs.AI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2026-04-24T17:00:53Z","title_canon_sha256":"fcaa1e155e8da08bdb29158ea7f06cb86fce10519c2e887483704800816dda8c"},"schema_version":"1.0","source":{"id":"2607.11889","kind":"arxiv","version":1}},"canonical_sha256":"232c87eb97e702827df3248ca7f98f7a13978c262619a6103916b8fced29f3dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"232c87eb97e702827df3248ca7f98f7a13978c262619a6103916b8fced29f3dc","first_computed_at":"2026-07-15T00:21:21.716081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-15T00:21:21.716081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ivm2u8yJGWblkqSoKcplBti6Fl26Avz2eTlYrBerm/Q+GMqtJQrGumikqh8k8okaKGD8LBn7f66dTB+raP60CQ==","signature_status":"signed_v1","signed_at":"2026-07-15T00:21:21.717022Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.11889","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03c3f39f2ccd03cfaf99c457764c13971d9986da4ac38ca5d61933437a91622e","sha256:061a3e18c9c9979c3b881e1b02cfc92c20704531d03396dba8d6683df147b91d"],"state_sha256":"703540dfae9c59c6f4620e2b918bd622f7d7febdb1d38a5fc9c7ef5d22a76f4e"}