chatgpt-image-latest vs Gemini 3.1 Pro Preview

OpenAI chatgpt-image-latestGoogle Gemini 3.1 Pro Preview
VendorOpenAIGoogle
Context window—1,048,576
Max output—65,536
ReasoningNoYes
Tool callingNoYes
File inputYesYes
Inputtext, imagetext, image, video, audio, file
Outputimagetext
Released2025-12-162026-02-19