Doubao-Seedream-4.5 vs Grok 4.20 Multi-Agent

ByteDance Doubao-Seedream-4.5xAI Grok 4.20 Multi-Agent
VendorByteDancexAI
Context window—1,000,000
Max output——
ReasoningNoYes
Tool callingNoYes
File inputYesYes
Inputtext, imagetext, image
Outputimagetext
Released2025-12-032026-03-09