Grok 4.20 Reasoning
JSON →Stable reasoning variant of Grok 4.20 released on March 9, 2025, optimized for complex reasoning tasks.
Specs
context window 2.0M tokens
max output 2.0M tokens
input price $2 / 1M tokens
output price $6 / 1M tokens
Capabilities
reasoningstreamingcode-generationfunction-callingtool-usevision
Dates
releasedMar 2025
API
full doc /v1/models/grok-4.20-0309-reasoning