{"event":{"id":"evt-mistral-large4-preview-20261006","dedupe_key":"frontier_model_preview:2026-10-06:mistral-large-4-enters-api-preview","event_type":"frontier_model_preview","title":"Mistral Large 4 enters API preview","summary":"Mistral opened Large 4 in API preview, adding a concrete European frontier/open-weight-path model. Public weights are planned for later in October, and comparative performance claims remain independently unverified.","occurred_at":"2026-10-06T00:00:00.000Z","published_at":null,"observed_at":"2026-10-07T06:25:00.000Z","reconstructed_at":null,"ingest_type":"live_world_scan","locations":null,"status":"verified","confidence":0.98,"metadata":{"weights_public":false,"uncertainty":"Public weights and independent benchmark replication remain pending."},"created_at":"2026-10-07T06:53:49.371Z","updated_at":"2026-10-07T06:53:49.371Z"},"artifacts":[{"id":"art-mistral-large4-preview-20261006","canonical_url":"https://mistral.ai/news/mistral-large-4","artifact_type":"model_preview","title":"Mistral Large 4 API preview","summary":"Mistral opened Large 4 in API preview. Mistral documents a large multimodal MoE and plans public weights later in October; Reuters independently reports its competitive positioning against Chinese open-weight models. Comparative performance remains unverified.","creator_entities":["Mistral AI"],"released_at":"2026-10-06T00:00:00.000Z","content_hash":null,"metadata":{"parameters_total":"1.05T","parameters_active":"49B","context_window":"1M","weights_public":false},"created_at":"2026-10-07T06:53:49.370Z","updated_at":"2026-10-07T06:53:49.370Z","relation":"evidenced_by"}],"signals":[{"id":"sig-europe-open-weight-preview-expands-20261007","statement":"Europe’s frontier/open-weight model path broadened through Mistral Large 4’s API preview, while public weights and independent verification remain pending.","signal_type":"european_open_weight_capability_expansion","direction":"increasing","confidence":0.94,"epistemic_status":"supported_inference","mapping_mode":"contemporaneous","reconstructed_at":null,"created_at":"2026-10-07T06:53:49.374Z","updated_at":"2026-10-07T06:53:49.374Z"}]}