Inferbase
Beta
Grok 4 Fast Reasoning
grok-4-fast is X's latest advancement in cost-efficient reasoning models.
Input
Output
Context
2000K
Max Output
—
Parameters
—
Use Cases & Strengths
Best For
academic research
api integration
clinical support
data analysis
financial analysis
general
Technical Specifications
Model TypeChat
Context Window2.0M
Max Output Tokens—
Parameters—
Training Cutoff—
Licenseproprietary
Capabilities
Input Modalities
textimage
Output Modalities
text
Features
chain_of_thoughtfunction_callingreasoningstructured_outputvision
Benchmarks
Resources & Links
proprietary — Proprietary - API access only
Related Tools
Data sourced from official provider APIs and documentation
Last updated: Feb 5, 2026
Build Your AI Stack with Confidence
Explore models, compare pricing and benchmarks, and right-size your infrastructure — all in one place.