gpt-4o-image vs GLM 5.2

OpenAI gpt-4o-imageZ.ai GLM 5.2
VendorOpenAIZ.ai
Context window—1,000,000
Max output—128,000
ReasoningNoYes
Tool callingNoYes
File inputNoNo
Inputtexttext
Outputimage, texttext
Released—2026-06-16