{"event":{"id":"evt-2025q1-claude37-code","dedupe_key":"historical_material_change:2025-02-24:claude-3-7-and-claude-code-research-preview-launch","event_type":"historical_material_change","title":"Claude 3.7 and Claude Code research preview launch","summary":"Anthropic released hybrid extended-thinking Claude 3.7 Sonnet and a command-line Claude Code research preview.","occurred_at":"2025-02-24T00:00:00.000Z","published_at":"2025-02-24T00:00:00.000Z","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":"Anthropic released hybrid extended-thinking Claude 3.7 Sonnet and a command-line Claude Code research preview.","what_must_not_be_inferred":"Model availability differs from coding-agent preview; autonomous coding claims do not establish unsupervised reliability.","availability_status":"model_release_and_research_preview","affected_layers":["layer-models","layer-agents","layer-software","layer-human"],"epistemic_status":"observed_fact"},"created_at":"2026-10-10T08:11:02.804Z","updated_at":"2026-10-10T08:11:02.804Z"},"artifacts":[{"id":"art-2025q1-claude37-code","dedupe_key":"a32f2fdd9d4fc461a40b889a1eff1c1f005430ca6242fb437c149244cf0938db","canonical_url":"https://www.anthropic.com/news/claude-3-7-sonnet","evidence_locator":"","artifact_type":"official_announcement","title":"Claude 3.7 and Claude Code research preview launch","summary":"Anthropic released hybrid extended-thinking Claude 3.7 Sonnet and a command-line Claude Code research preview.","creator_entities":["Anthropic"],"released_at":"2025-02-24T00:00:00.000Z","content_hash":null,"metadata":{"historical_scope":"2025-Q1"},"created_at":"2026-10-10T08:11:02.798Z","updated_at":"2026-10-10T08:11:02.798Z","relation":"documented_by"}],"signals":[{"id":"sig-2025q1-agents","statement":"Browser-operation previews, research sessions and coding/tool SDKs made bounded delegation accessible with human takeover and review boundaries.","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":"2026-10-10T08:11:02.807Z","updated_at":"2026-10-10T08:11:02.807Z"},{"id":"sig-2025q1-human","statement":"Eligible users gained task-oriented browser, research and coding interfaces; errors and supervision remained material.","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":"2026-10-10T08:11:02.808Z","updated_at":"2026-10-10T08:11:02.808Z"},{"id":"sig-2025q1-models","statement":"Downloadable reasoning weights, hybrid extended thinking and compact multimodal releases widened model choices without independent frontier-parity claims.","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":"2026-10-10T08:11:02.807Z","updated_at":"2026-10-10T08:11:02.807Z"},{"id":"sig-2025q1-software","statement":"Agent tooling moved into browser tasks, terminal coding and integrated response/tool APIs, with preview scope explicit.","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":"2026-10-10T08:11:02.808Z","updated_at":"2026-10-10T08:11:02.808Z"}]}