LLM GatewaygeminiGemini 4 Argon (Google AI Studio)google-ai-studio/gemini-4-argonLLM GatewayReleased Oct 13, 20261,048,576 token context windowIn $4.00 · Out $20.00ReasoningTool callingStructured outputAttachmentsInputtextimagevideoaudiopdfOutputtext