{"event":{"id":"evt-hist-20260925-longcat-25-preview-api","dedupe_key":"model_api_preview_availability:2026-09-25:longcat-2-5-preview-becomes-available-through-official-api","event_type":"model_api_preview_availability","title":"LongCat-2.5-Preview becomes available through official API","summary":"Official LongCat API changelog explicitly dates LongCat-2.5-Preview availability September 25. The supplied LongCat 2.0 blog does not establish a 2.5 milestone; reported model quality is vendor claimed.","occurred_at":"2026-09-25T00:00:00.000Z","published_at":"2026-09-25T00:00:00.000Z","observed_at":"2026-10-18T05:09:00.000Z","reconstructed_at":"2026-10-18T05:09:00.000Z","ingest_type":"historical_backfill","locations":null,"status":"verified","confidence":0.92,"metadata":{"date_precision":"day","external_postcutoff_id":"2026-09-25-meituan-longcat-2-5-preview","canonical_search_exhaustive":0,"independent_outcomes_unproven":1,"no_production_writes":1,"publication_milestone_only":1},"created_at":"2026-10-18T05:49:32.053Z","updated_at":"2026-10-18T05:49:32.053Z"},"artifacts":[{"id":"art-hist-20260925-longcat-25-preview-api","dedupe_key":"ac9aeb367a7004328078486e95d93531983a9b3523ad3e34ed786a9ed4eaa01c","canonical_url":"https://longcat.chat/platform/docs/ChangeLog.html","evidence_locator":"","artifact_type":"original_primary_publication","title":"LongCat-2.5-Preview becomes available through official API","summary":"","creator_entities":[],"released_at":"2026-09-25T00:00:00.000Z","content_hash":null,"metadata":[],"created_at":"2026-10-18T05:49:32.052Z","updated_at":"2026-10-18T05:49:32.052Z","relation":"documented_by"}],"signals":[]}