Grok 4 Fast Reasoning
Proprietary
About
Accelerated agentic reasoning variant of Grok 4, optimized for multi-step workflows.
Capabilities
MultimodalFunction CallingTool UseJSON Mode
Providers(1)
| Provider | Input (per 1M) | Output (per 1M) | Type | |
|---|---|---|---|---|
| Microsoft Foundry | — | — | ServerlessProvisioned |
Specifications
FamilyGrok
Released2026-03-01
ArchitectureDecoder Only
Specializationgeneral
LicenseProprietary