{"entity":"grok-4-fast","id":"ent_grok-4-fast","name":"Grok 4 Fast","predicate":"context_window","label":"context window","page":"https://asof.is/record/grok-4-fast/context_window","as_of":"2026-11-04","summary":"As of November 4, 2026, Grok 4 Fast's context window on the AsOf record is 2 M token, dated September 19, 2025, from a primary source (x.ai). The record holds 1 claim on Grok 4 Fast's context window, 1 still open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.","current":["clm_B23CF82119F1"],"latest_period":null,"claims":[{"id":"clm_B23CF82119F1","value":"2M token","valid_from":"2025-09-19","valid_to":null,"published":"2025-09-19","recorded":"2026-11-04","confidence":0.95,"status":"valid","assertable":true,"superseded_by":null,"sources":[{"url":"https://x.ai/news/grok-4-fast","tier":"primary","publisher":"xAI","published_at":"2025-09-19T00:00:00+00:00"}],"evidence":{"by":"page-read","on":"2026-11-04","quote":"We're rolling out Grok 4 Fast as two models: grok-4-fast-reasoning and grok-4-fast-non-reasoning , each with a 2M token context window.","url":"https://x.ai/news/grok-4-fast"}}],"replaced":[],"faq":[{"question":"What is Grok 4 Fast's current context window?","answer":"2 M token, dated September 19, 2025, from a primary source (x.ai). The record asserts this claim as of November 4, 2026 (status valid, confidence 0.95)."}],"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"}}}