{"event":{"id":"evt-2024q1-gemma","dedupe_key":"historical_material_change:2024-02-21:gemma-2b-and-7b-weights-and-development-tools-release","event_type":"historical_material_change","title":"Gemma 2B and 7B weights and development tools release","summary":"Google released Gemma 2B/7B pretrained and instruction-tuned weights with inference and fine-tuning integrations.","occurred_at":"2024-02-21T00:00:00.000Z","published_at":"2024-02-21T00:00:00.000Z","observed_at":"2026-10-09T19:12:47.000Z","reconstructed_at":"2026-10-09T19:12:47.000Z","ingest_type":"live_world_scan","locations":null,"status":"verified","confidence":0.97,"metadata":{"what_happened_at_time":"Google released Gemma 2B/7B pretrained and instruction-tuned weights with inference and fine-tuning integrations.","what_must_not_be_inferred":"Open weights under Gemma terms must not be conflated with unrestricted open-source licensing.","availability_status":"released","affected_layers":["layer-open-source","layer-models","layer-software"],"epistemic_status":"observed_fact"},"created_at":"2026-10-09T21:04:17.173Z","updated_at":"2026-10-09T21:04:17.173Z"},"artifacts":[{"id":"art-2024q1-gemma","dedupe_key":"cb1559698fb56076b4da076c7e23c9632043bf424a8ad64a036a7e35d5c575e6","canonical_url":"https://blog.google/innovation-and-ai/technology/developers-tools/gemma-open-models/","evidence_locator":"","artifact_type":"official_announcement","title":"Gemma 2B and 7B weights and development tools release","summary":"Google released Gemma 2B/7B pretrained and instruction-tuned weights with inference and fine-tuning integrations.","creator_entities":["Google"],"released_at":"2024-02-21T00:00:00.000Z","content_hash":null,"metadata":{"historical_scope":"2024-Q1"},"created_at":"2026-10-09T21:04:17.166Z","updated_at":"2026-10-09T21:04:17.166Z","relation":"documented_by"}],"signals":[{"id":"sig-2024q1-open-source","statement":"Open model development diversified between transparent OLMo training artifacts and Gemma's licensed weight distribution; these are distinct openness regimes.","signal_type":"historical_layer_delta","direction":"increasing","confidence":0.93,"epistemic_status":"supported_inference","mapping_mode":"retrospective","reconstructed_at":"2026-10-09T19:12:47.000Z","created_at":"2026-10-09T21:04:17.178Z","updated_at":"2026-10-09T21:04:17.178Z"}]}