{"entity":"gpt-4","id":"ent_gpt-4","name":"GPT-4","predicate":"model_release","lineage":"https://asof.is/models/gpt","label":"release date","page":"https://asof.is/record/gpt-4/model_release","as_of":"2026-11-04","summary":"As of November 4, 2026, the AsOf record says GPT-4 was released on February 27, 2025 (as GPT-4.5), from a primary source (developers.openai.com). The record holds 1 claim on GPT-4's release, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.","current":["clm_BBC2EB212A86"],"latest_period":null,"claims":[{"id":"clm_BBC2EB212A86","value":"GPT-4.5","valid_from":"2025-02-27","valid_to":null,"published":"2025-02-27","recorded":"2026-11-03","confidence":0.5,"status":"valid","assertable":true,"superseded_by":null,"sources":[{"url":"https://developers.openai.com/api/docs/changelog#2025-02-27","tier":"primary","publisher":"OpenAI","published_at":"2025-02-27T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-11-04","quote":"Feb 27 Feature GPT-4.5 v1/chat/completions v1/assistants v1/batch Released a research preview of GPT-4.5 —our largest and most capable chat model yet.","url":"https://developers.openai.com/api/docs/changelog#2025-02-27","excerpt":"Feature · GPT-4.5 · v1/chat/completions · v1/assistants · v1/batch · Released a research preview of GPT-4.5 —our largest and most capable chat model yet. GPT-4.5's high \"EQ\" and understanding of user intent make it better at creative tasks and agentic planning."}}],"replaced":[],"faq":[{"question":"When was GPT-4 released?","answer":"On February 27, 2025 (as GPT-4.5), from a primary source (developers.openai.com) (status valid, confidence 0.50)."}],"legend":{"dates":"valid_from: when the claim took effect (a period figure: the day its period closed). published: the earliest day a source on the record published it (a filing's filing date, a post's date; null when no source carries one). recorded: the day AsOf first held it. A figure can take effect weeks before it is published.","why_not":{},"checked_by":{"page-read":"its source page states the value and the date"}}}