{"event":{"id":"evt-hist-2026phase27-ai2-astabrief","dedupe_key":"open_weight_model_release:2026-10-02:ai2-open-sources-astabrief-8b-cited-scientific-report-model","event_type":"open_weight_model_release","title":"Ai2 open-sources AstaBrief 8B cited scientific-report model","summary":"Ai2 published AstaBrief 8B and training data on Oct 2 2026; its reported 51.1 versus 178.5 second report-generation pipeline speeds are issuer benchmarks, not independently established general science quality.","occurred_at":"2026-10-02T00:00:00.000Z","published_at":"2026-10-02T00:00:00.000Z","observed_at":"2026-10-18T08:30:00.000Z","reconstructed_at":"2026-10-18T08:30:00.000Z","ingest_type":"historical_backfill","locations":null,"status":"verified","confidence":0.9,"metadata":{"evidence_only":1,"global_novelty_unproven":1,"independent_outcomes_unproven":1,"original_index_position":956},"created_at":"2026-10-19T05:50:59.473Z","updated_at":"2026-10-19T05:50:59.473Z"},"artifacts":[{"id":"art-hist-2026phase27-ai2-astabrief","dedupe_key":"73520328e219be0ea72f7adf9e3cfd7dd4f9968c8ca72c708c68d2ce9f7a36b7","canonical_url":"https://allenai.org/blog/astabrief","evidence_locator":"","artifact_type":"original_publication","title":"Ai2 open-sources AstaBrief 8B cited scientific-report model","summary":"","creator_entities":[],"released_at":"2026-10-02T00:00:00.000Z","content_hash":null,"metadata":[],"created_at":"2026-10-19T05:50:59.473Z","updated_at":"2026-10-19T05:50:59.473Z","relation":"documented_by"}],"signals":[]}