AI Model Watch
Deprecations / Migrate

Migrate off Grok Code Fast 1

Retired

Grok Code Fast 1 has been retired and shut down on 15 May 2026. xAI's official replacement is Grok Build 0.1. The cheapest comparable model we track is Grok 4.3 (xAI) at $1.56 per 1M tokens blended.

Last verified: 26 Sep 2026 · sourced from official provider documentation

StatusRetiredxAI
Shut down15 May 2026plan ahead
Official replacementGrok Build 0.1$1.25 /M blendedCheapest alternativeGrok 4.3$1.56 /M blended
What changes

Grok Code Fast 1 → Grok Build 0.1

SpecGrok Code Fast 1Grok Build 0.1
StatusRetiredGA
Blended price /1M—$1.25
Input / output /1M—$1 / $2
Context window256K256K
Max output——
Modalitytext-in, image-in, text-outtext-in, image-in, text-out
Knowledge cutoff——

API string was grok-code-fast-1 → switch to grok-build-0.1. See Grok Build 0.1's full spec sheet →

Cheapest alternatives

Budget-friendly replacements for Grok Code Fast 1

Generally-available models that match Grok Code Fast 1's capabilities (and at least half its 256K context), ranked by blended price. Every number is computed from official catalog prices.

ModelBlended /1MInput / outputContext
Grok 4.3
xAI
$1.56$1.25 / $2.501M
Grok 4.20 (0309) Reasoning
xAI
$1.56$1.25 / $2.501M
Grok 4.20 (0309) Non-Reasoning
xAI
$1.56$1.25 / $2.501M
FAQ

Migrating off Grok Code Fast 1

What replaces Grok Code Fast 1?

xAI's recommended migration for Grok Code Fast 1 is Grok Build 0.1. The cheapest comparable model in our catalog is Grok 4.3 (xAI) at $1.56/1M blended.

Is Grok Code Fast 1 still available?

No — Grok Code Fast 1 has been retired (shut down 15 May 2026) and is no longer available via xAI's API.

What is the cheapest alternative to Grok Code Fast 1?

Grok 4.3 (xAI) is the cheapest generally-available alternative we track that matches Grok Code Fast 1's capabilities, at $1.25 per 1M input and $2.50 per 1M output tokens ($1.56/1M blended).

Browse the full deprecation watch → or see Grok Code Fast 1's full spec sheet →