LLM Gatewaygemini-flashGemini 3.5 Flash (Google Vertex AI)google-vertex/gemini-3.5-flashLLM GatewayReleased May 19, 20261,048,576 token context windowIn $1.50 · Out $9.00ReasoningTool callingStructured outputAttachmentsTemp controlsInputtextimagevideoaudiopdfOutputtext