gpt-4-all vs Grok 4.20 Multi-Agent

OpenAI gpt-4-allxAI Grok 4.20 Multi-Agent
VendorOpenAIxAI
Context window8,0002,048,000
Max output4,0961,000,000
ReasoningNoYes
Tool callingYesYes
File inputYesYes
Inputtext, imagetext, image
Outputtext, imagetext
Released2026-03-08