Grok 4.7 vs gpt-5-pro

xAI Grok 4.7OpenAI gpt-5-pro
VendorxAIOpenAI
Context window500,000400,000
Max output—272,000
ReasoningYesYes
Tool callingYesYes
File inputYesYes
Inputtext, imagetext, image
Outputtexttext
Released2026-09-212025-08-07