Is Grok 4.1 Fast deprecated or retired?

Yes. Grok 4.1 Fast is Retired per xAI's own deprecation notice, retired on 2026-05-15. ModelPriceWatch last re-verified this status on 2026-08-03.

Is Grok 4.1 Fast deprecated?

xAI · lifecycle status verified Aug 3, 2026 against the provider's own notice.

Yes — Grok 4.1 Fast is retired as of May 15, 2026. xAI no longer serves it on the endpoint we price. The prices below are kept for historical reference only.

Last verified pricing

historical reference — not a buy recommendation

Grok 4.1 Fast was last priced at $0.200 per 1M input tokens and $0.500 per 1M output tokens, with a 2M-token context window. Full history stays on the Grok 4.1 Fast model page.

What replaced Grok 4.1 Fast?

successor named by xAI

xAI's named successorfrom the deprecation notice — not our inference

Model	Input $/M	Output $/M	Context
Grok 4.1 Fast Retired	$0.200	$0.500	2M
Grok 4.3	$1.25	$2.50	1M	details →

Picking a replacement

We don't hold a benchmark average for Grok 4.1 Fast, so we won't claim any model is "equivalent" to it. Compare live prices across every current model in the migration calculator.

Migrating off Grok 4.1 Fast? The migration calculator compares your exact input/output token mix against every current model we track, with benchmark tradeoffs. Lifecycle data on this page comes from xAI's own notice and was last re-verified on Aug 3, 2026. See all retired & deprecated models.