Project AURIONAI Use-Cases Research & Innovation
code

grok-code-fast-1

xAI coding model; not on the current xAI model list.

SpaceXAI (xAI)SpaceXAI (xAI)USAGrokFamily
SpaceXAI (xAI)
Levelmodel
Classcode
Parametersnot in the notes
Context256,000
Released28 Aug 2025
Opennessproprietary
Runs onnot in the notes
Statusdeprecated

Benchmark Results

vendor-reported
SWE-bench Verifiedcoding
xAI internal harnessvendor-reported
70.8
050100

Score in %. Higher is better.

verdent.ai
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).

R&D Topics

Agentic software engineeringproduced byCode language modelsproduced by

Identity

Developer
SpaceXAI (xAI)
Family
Grok
Released
28 Aug 2025 sourcessecondary report
Weights published
–
Record checked
10 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.

Architecture and Size

Architecture
not in the notes Not disclosed
Total parameters
– sources
Active parameters
–
Checkpoint parameters
–
Context length
256,000 tokens
Input
text
Output
text
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).

Openness and Access

Openness
proprietary
Licence
Proprietary sources
Access routes
API
Where this comes from
The licence file governs over registry tags and aggregator labels.

Deployment

Runs on
not in the notes
Footprint
not in the notes
Runtimes
not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.

Indonesia

Indonesian support
not stated
Regional languages
not in the notes
Jakarta hosting
unknown
Languages
not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.

Lineage

The notes record no lineage for this model.

Industry Use Cases

No industry use case links this model.

Sources

  1. Grok for Coding (2026): What xAI Actually Ships verdent.ai https://www.verdent.ai/guides/grok-for-coding-2026
  2. Grok Models & Pricing | SpaceXSI Docs docs.x.ai https://docs.x.ai/docs/models

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "Grok-Code-Fast-1", https://aurion.semai.id/models/spacexai-grok-code-fast-1/, records of October 2026.