Grok 4.7 vs GPT-5

xAI Grok 4.7OpenAI GPT-5
VendorxAIOpenAI
Context window500,000400,000
Max output—128,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, imagetext, image
Outputtexttext
Released2026-09-212025-08-07