{
  "$schema": "https://modeldeprecations.dev/api/v1/schema.json",
  "provider": "xai",
  "model": "grok-4-1-fast-non-reasoning",
  "name": "Grok 4.1 Fast Non-Reasoning",
  "aliases": [],
  "description": "The straight-through twin of Grok 4.1 Fast Reasoning, same weights and same 2M window with thinking turned off. Splitting one model into two ids by reasoning mode is exactly what grok-4.3's reasoning_effort parameter made unnecessary, and both halves went at once.",
  "shutdown_on": "2026-05-15",
  "status": "retired",
  "replacements": [
    {
      "provider": "xai",
      "model": "grok-4.3",
      "recommended": true,
      "note": "Maps to grok-4.3 with reasoning effort \"none\". Set that explicitly rather than relying on the redirect, or a later change to the default leaves you paying for thinking tokens you never asked for.",
      "external": false
    }
  ],
  "sources": [
    {
      "url": "https://docs.x.ai/developers/migration/may-15-retirement",
      "title": "Grok Model Retirement on May 15, 2026",
      "accessed": "2026-08-03"
    }
  ],
  "last_verified": "2026-08-03",
  "computed_status": "retired",
  "asOf": "2026-08-03"
}