grok-4-fast-reasoning
validasserted
- Valid from
- 2026-05-15
- Valid until
- still holds
- Published
- no source on record carries a date
- Recorded by AsOf
- 2026-11-04
- Checked
- 2026-11-04 · its source page states the value and the date
- Confidence
- 0.95
Sources
“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”— what the page says, read 2026-11-04
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