> ## Documentation Index > Fetch the complete documentation index at: https://docs.anyfast.ai/llms.txt > Use this file to discover all available pages before exploring further. # gemini-3.5-flash-lite > Generate a response with Gemini 3.5 Flash-Lite. The final non-empty conversation turn must use the user role. ## OpenAPI ````yaml api-reference/model-api/google/openapi/gemini-3.5-flash-lite/openapi.yaml POST /v1beta/models/gemini-3.5-flash-lite:generateContent openapi: 3.1.0 info: title: Gemini 3.5 Flash-Lite description: >- Generate text and structured data from text and multimodal inputs through the native Gemini API. Sampling parameters temperature, topP, and topK are deprecated for this model. version: 1.0.0 servers: - url: https://www.anyfast.ai security: [] paths: /v1beta/models/gemini-3.5-flash-lite:generateContent: post: summary: Generate content description: >- Generate a response with Gemini 3.5 Flash-Lite. The final non-empty conversation turn must use the user role. operationId: gemini35FlashLiteGenerateContent parameters: - name: key in: query required: true description: AnyFast API key. schema: type: string example: YOUR_API_KEY requestBody: required: true content: application/json: schema: type: object required: - contents properties: contents: type: array minItems: 1 description: >- Conversation turns. Do not end the request with a non-empty model turn. items: $ref: '#/components/schemas/Content' systemInstruction: $ref: '#/components/schemas/SystemInstruction' generationConfig: $ref: '#/components/schemas/GenerationConfig' tools: type: array description: >- Function declarations or supported built-in Gemini tools such as Google Search and code execution. items: $ref: '#/components/schemas/Tool' toolConfig: type: object additionalProperties: true description: Tool execution and function-calling configuration. safetySettings: type: array description: Per-category content safety thresholds. items: $ref: '#/components/schemas/SafetySetting' example: contents: - role: user parts: - text: Extract the invoice number, date, and total as JSON. generationConfig: thinkingConfig: thinkingLevel: minimal responseMimeType: application/json maxOutputTokens: 1024 responses: '200': description: Content generated successfully content: application/json: schema: $ref: '#/components/schemas/GenerateContentResponse' '400': description: >- Invalid request, including a request ending with a non-empty model turn content: application/json: schema: $ref: '#/components/schemas/Error' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/Error' '429': description: Rate limit exceeded components: schemas: Content: type: object required: - parts properties: role: type: string enum: - user - model default: user parts: type: array minItems: 1 items: $ref: '#/components/schemas/Part' SystemInstruction: type: object properties: parts: type: array items: $ref: '#/components/schemas/Part' GenerationConfig: type: object description: >- Do not include temperature, topP, topK, candidateCount, or thinkingBudget. properties: thinkingConfig: type: object properties: thinkingLevel: type: string enum: - minimal - medium - high default: minimal description: >- Use minimal for maximum throughput, or medium/high for multi-step tool use. maxOutputTokens: type: integer minimum: 1 maximum: 65536 responseMimeType: type: string example: application/json responseSchema: type: object additionalProperties: true description: JSON Schema for structured output. stopSequences: type: array items: type: string Tool: type: object properties: functionDeclarations: type: array items: type: object required: - name - description - parameters properties: name: type: string description: type: string parameters: type: object additionalProperties: true description: JSON Schema for function arguments. googleSearch: type: object additionalProperties: true codeExecution: type: object additionalProperties: true urlContext: type: object additionalProperties: true SafetySetting: type: object required: - category - threshold properties: category: type: string threshold: type: string GenerateContentResponse: type: object properties: candidates: type: array items: type: object properties: content: $ref: '#/components/schemas/Content' finishReason: type: string example: STOP index: type: integer example: 0 safetyRatings: type: array nullable: true items: type: object additionalProperties: true usageMetadata: type: object properties: promptTokenCount: type: integer candidatesTokenCount: type: integer cachedContentTokenCount: type: integer thoughtsTokenCount: type: integer toolUsePromptTokenCount: type: integer totalTokenCount: type: integer serviceTier: type: string example: standard promptTokensDetails: type: array items: $ref: '#/components/schemas/ModalityTokenCount' toolUsePromptTokensDetails: type: array nullable: true items: $ref: '#/components/schemas/ModalityTokenCount' modelVersion: type: string example: gemini-3.5-flash-lite responseId: type: string quota: type: integer description: AnyFast quota usage reported for the request. Error: type: object properties: error: type: object properties: code: type: integer message: type: string status: type: string Part: type: object description: A text, media, function-call, or function-response part. properties: text: type: string thought: type: boolean description: Whether this part contains model reasoning. thoughtSignature: type: string description: >- Opaque signature that must be preserved in multi-turn tool workflows. inlineData: type: object required: - mimeType - data properties: mimeType: type: string example: image/jpeg data: type: string description: Base64-encoded image audio: null video: null or document data.: null fileData: type: object required: - mimeType - fileUri properties: mimeType: type: string example: application/pdf fileUri: type: string format: uri description: Gemini Files URI or supported public media URL. functionCall: type: object properties: name: type: string args: type: object additionalProperties: true functionResponse: type: object properties: name: type: string id: type: string description: Call ID returned by the model. response: type: object additionalProperties: true executableCode: type: object properties: language: type: string example: PYTHON code: type: string codeExecutionResult: type: object properties: outcome: type: string example: OUTCOME_OK output: type: string ModalityTokenCount: type: object properties: modality: type: string example: TEXT tokenCount: type: integer ````