{"entity":"grok-4-fast","name":"Grok 4 Fast","events":[{"date":"2025-09-19","until":null,"published":"2025-09-19","recorded":"2026-11-04","predicate":"context_window","value":"2M token","status":"valid","assertable":true,"id":"clm_B23CF82119F1","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"}},{"date":"2025-09-19","until":null,"published":"2025-09-19","recorded":"2026-11-04","predicate":"model_release","value":"Grok 4 Fast","status":"valid","assertable":true,"id":"clm_DFB0958C2D0F","evidence":{"by":"page-read","on":"2026-11-04","quote":"Sep 19, 2025 Grok 4 Fast Pushing the Frontier of Cost-Efficient Intelligence","url":"https://x.ai/news/grok-4-fast"}},{"date":"2026-05-15","until":null,"published":null,"recorded":"2026-11-04","predicate":"retired","value":"grok-4-fast-reasoning","status":"valid","assertable":true,"id":"clm_88F24D97EEE0","evidence":{"by":"page-read","on":"2026-11-04","quote":"Effective May 15, 2026 at 12:00 PM PT , the following models will be retired from the xAI API: grok-4-1-fast-reasoning grok-4-1-fast-non-reasoning grok-4-fast-reasoning grok-4-fast-non-reasoning grok-4-0709 grok-code-fast-1 grok-3","url":"https://docs.x.ai/developers/migration/may-15-retirement"}}],"complete":true,"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"}}}