xAI · Official-source model record
Grok Code Fast 1
Grok · Version grok-code-fast-1
Publisher-sourced inventory. Specifications come from official documentation and model cards. “Not documented” means we have no verified value. This inventory is separate from our editorial reviews.
Coverage & sources ↗Current catalog answers
What to know about Grok Code Fast 1
AI-compiled from linked model documentation. This is a catalog reference, not an independent performance review. Catalog checked October 23, 2026.
What happened to Grok Code Fast 1, and what replaces it?
These details come from the linked publisher material for this model. Reported capabilities and training descriptions are publisher statements, not independent test results.
- Original API model retirement
- xAI records retirement of the original model on 2026-05-15 at 12:00 PM Pacific. Its old identifier can continue resolving to a replacement, so a successful request does not prove the original model is running. Source
- Current alias target
- The per-model migration table routes this identifier to grok-build-0.1. Replacement-model pricing applies; original-model limits and prices are not copied onto this record. Source
Which Grok Code Fast 1 does this page describe?
Grok Code Fast 1 is a model record from xAI in the Grok family. Source
The recorded model identifier or checkpoint is grok-code-fast-1. Use that exact identifier when checking documentation or a provider listing. Source
How can you access Grok Code Fast 1?
The catalog records the historical API access route for Grok Code Fast 1. Source
As of the catalog check, this version was marked retired. Source Check the linked lifecycle information before starting a new integration.
For a new integration, use the publisher’s replacement guidance and check its current account, region and endpoint requirements. Historical API access does not mean the retired endpoint can still be called.
Keep the exact version in view
Other Grok models from xAI.
These are separate records in the same publisher family. A shared family name does not establish equal capabilities or interchangeable licenses.
Grok 4.20
API · 1,000,000 context tokens
Grok 4.20 (Non-Reasoning)
API · 1,000,000 context tokens
Grok 4.20 Multi-Agent Beta
API · 1,000,000 context tokens
Grok 4.3
API · 1,000,000 context tokens
Grok 4.5
API · 500,000 context tokens
Grok 4.6
API · 500,000 context tokens
The documented record
Specifications, with their sources.
A missing value remains unknown. Input limits, output limits and the total context window are separate measurements.
- Publisher
- xAISource ↗
- Family
- GrokSource ↗
- Version
- grok-code-fast-1Source ↗
- Availability
- RetiredSource ↗
- Access
- APISource ↗
- Inputs
- Not documented
- Outputs
- Not documented
- Context window
- Not documented
- Maximum input
- Not documented
- Maximum output
- Not documented
- Knowledge cutoff
- Not documented
- Training-data cutoff
- Not documented
- Training completed
- Not documented
- Release date
- Not documented
- License
- Not documented
- Input price / 1M tokens
- Not documented
- Output price / 1M tokens
- Not documented
Read this with the numbers.
Retired May 15, 2026. Legacy endpoint redirection does not mean the original model remains available.
Model identifiers and aliases 0
No additional identifier has been verified.
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