{"event":{"id":"evt-2025q2-claude4","dedupe_key":"historical_material_change:2025-05-22:claude-4-releases-and-claude-code-reaches-ga","event_type":"historical_material_change","title":"Claude 4 releases and Claude Code reaches GA","summary":"Anthropic releases Opus 4 and Sonnet 4 and makes Claude Code generally available.","occurred_at":"2025-05-22T00:00:00.000Z","published_at":"2025-05-22T00:00:00.000Z","observed_at":"2026-10-10T06:24:42.000Z","reconstructed_at":"2026-10-10T06:24:42.000Z","ingest_type":"live_world_scan","locations":null,"status":"verified","confidence":0.96,"metadata":{"what_happened_at_time":"Anthropic releases Opus 4 and Sonnet 4 and makes Claude Code generally available.","what_must_not_be_inferred":"Vendor evaluations and long-running demonstrations do not establish general unattended autonomy.","availability_status":"model_release_and_tool_ga","affected_layers":["layer-models","layer-agents","layer-software"],"epistemic_status":"observed_fact","reported_capabilities_are_actor_claims":true,"time_precision":"day"},"created_at":"2026-10-10T08:25:19.353Z","updated_at":"2026-10-10T08:25:19.353Z"},"artifacts":[{"id":"art-2025q2-claude4","dedupe_key":"5027b2bf60fb92d28df06b89a7e28abfc2e95b9c7652c685957854d4cc8af953","canonical_url":"https://www.anthropic.com/news/claude-4","evidence_locator":"","artifact_type":"official_announcement","title":"Claude 4 releases and Claude Code reaches GA","summary":"Anthropic releases Opus 4 and Sonnet 4 and makes Claude Code generally available.","creator_entities":["Anthropic"],"released_at":"2025-05-22T00:00:00.000Z","content_hash":null,"metadata":{"historical_scope":"2025-Q2","availability_status":"model_release_and_tool_ga"},"created_at":"2026-10-10T08:25:19.346Z","updated_at":"2026-10-10T08:25:19.346Z","relation":"documented_by"}],"signals":[{"id":"sig-2025q2-claude4","statement":"Anthropic releases Opus 4 and Sonnet 4 and makes Claude Code generally available. Vendor evaluations and long-running demonstrations do not establish general unattended autonomy.","signal_type":"historical_layer_delta","direction":"increasing","confidence":0.9,"epistemic_status":"supported_inference","mapping_mode":"retrospective","reconstructed_at":"2026-10-10T06:24:42.000Z","created_at":"2026-10-10T08:25:19.359Z","updated_at":"2026-10-10T08:25:19.359Z"}]}