Grok 4.7 vs GPT-5.4 Mini

xAI Grok 4.7OpenAI GPT-5.4 Mini
VendorxAIOpenAI
Context window500,000400,000
Max output—128,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, imagetext, image
Outputtexttext
Released2026-09-212026-03-17