Grok 4.6 vs Grok 4.20 Multi-Agent

xAI Grok 4.6xAI Grok 4.20 Multi-Agent
VendorxAIxAI
Context window500,0002,048,000
Max output2,000,0001,000,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, imagetext, image
Outputtexttext
Released2026-08-132026-03-09