# Grok 4 Fast timeline

entity: /record/grok-4-fast.md  
id: ent_grok-4-fast  


## 2025

- 2025-09-19 | context_window | 2M token | valid | [clm_B23CF82119F1](/claim/clm_B23CF82119F1.md)
- 2025-09-19 | model_release | Grok 4 Fast | valid | [clm_DFB0958C2D0F](/claim/clm_DFB0958C2D0F.md)

## 2026

- 2026-05-15 | retired | grok-4-fast-reasoning | valid | [clm_88F24D97EEE0](/claim/clm_88F24D97EEE0.md)

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.