Prior-generation Grok 4 reasoning model, now legacy after the Grok 4.3 release. A multimodal reasoning model with a 1M-token context window and text+image input, still available via the xAI API at slightly higher pricing than the current flagship.
profile normalized against the 47-model field
Context window· 1M of 1.05M95%
Max output· 33K of 272K12%
Output speed· 95 tok/s30%
Affordability—
Capability breadth· 8 of 1173%
Capability switches · 8 of 11
Reasoning mode
Tool / function use
Streaming
JSON mode
Structured outputs
Prompt caching
Fine-tuning
Web search
Code execution
Vision input
Audio input
Specifications
Every value carries a primary source and a verification date.
Capacity
Context window
1M
Max output
33K
Performance
Output speed
95 tok/s tok/s
Capabilities
Input modalities
Text, image
Output modalities
Text
Reasoning mode
Yes
Tool / function use
Yes
Streaming
Yes
JSON mode
Yes
Structured outputs
Yes
Prompt caching
Yes
Web search
Yes
Vision input
Yes (image input)
API
API model ID
grok-4-2
General
Release date
February 18, 2026
Benchmarks
Sourced evaluation scores, each verified against its primary source.