Starting April 29, 2025, Gemini 1.5 Pro and Gemini 1.5 Flash models are not available in projects that have no prior usage of these models, including new projects. For details, see Model versions and lifecycle.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[],[],null,["# Interface StartChatSessionRequest (1.9.0)\n\nAll params passed to initiate multiturn chat via startChat. \n\nInheritance\n-----------\n\n[StartChatParams](/vertex-ai/generative-ai/docs/reference/nodejs/latest/vertexai/startchatparams) \\\u003e StartChatSessionRequest\n\nPackage\n-------\n\n[@google-cloud/vertexai](../overview.html)\n\nProperties\n----------\n\n### googleAuth\n\n googleAuth: GoogleAuth;\n\nThe Google Auth to use for the request.\n\n### location\n\n location: string;\n\nThe Google Cloud project location to use for the request.\n\n### project\n\n project: string;\n\nThe Google Cloud project to use for the request.\n\n### publisherModelEndpoint\n\n publisherModelEndpoint: string;\n\nThe publisher model endpoint to use for the request.\n\n### resourcePath\n\n resourcePath: string;\n\nThe resource path to use for the request.\n\n### systemInstruction\n\n systemInstruction?: string | Content;\n\nOptional. The user provided system instructions for the model. Note: only text should be used in parts of [Content](/vertex-ai/generative-ai/docs/reference/nodejs/latest/vertexai/content)"]]
