> ## Documentation Index > Fetch the complete documentation index at: https://utoken-docs.yoostudio.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # OpenAI Chat Format > 根据对话历史创建模型响应。支持流式和非流式响应。 兼容 OpenAI Chat Completions API。 ## OpenAPI ````yaml post /v1/chat/completions openapi: 3.1.0 info: title: UToken API version: 1.0.0 description: Complete UToken API Reference Documentation servers: - url: https://utoken.yoostudio.ai description: Production security: [] tags: - name: Images / Native Gemini Format - name: Images / Native OpenAI Format - name: Images / Qwen OpenAI Compatible Format - name: Realtime Voice - name: Content Moderation - name: Text Embeddings - name: Unimplemented / Fine-tuning - name: Unimplemented / File Management - name: Models / List Models - name: Chat Completions - name: Chat Completions / Native Gemini Format - name: Chat Completions / Native OpenAI Format - name: Text Completions - name: Video Generation - name: Video Generation / Sora Format - name: Video Generation / Jimeng (Dreamina) Format - name: Video Generation / Kling AI Format - name: Document Reranking - name: Audio Processing - name: Audio Processing / Native OpenAI Format paths: /v1/chat/completions: post: tags: - Chat Completions / Native OpenAI Format summary: Chat Completions Format description: > Creates model responses based on conversation history. Supports both streaming and non-streaming responses. Compatible with the OpenAI Chat Completions API. operationId: createchatcompletion parameters: [] requestBody: required: true content: application/json: schema: type: object required: - model - messages properties: model: type: string description: Model ID examples: - gpt-4 messages: type: array items: type: object required: - role - content properties: role: type: string enum: - system - user - assistant - tool - developer description: Message Role content: oneOf: - type: string - type: array items: type: object properties: type: type: string enum: - text - image_url - input_audio - file - video_url text: type: string image_url: type: object properties: url: type: string description: Image URL or base64 encoded data detail: type: string enum: - low - high - auto x-apifox-orders: - url - detail input_audio: type: object properties: data: type: string description: Base64 encoded audio data format: type: string enum: - wav - mp3 x-apifox-orders: - data - format file: type: object properties: filename: type: string file_data: type: string file_id: type: string x-apifox-orders: - filename - file_data - file_id video_url: type: object properties: url: type: string x-apifox-orders: - url x-apifox-orders: - type - text - image_url - input_audio - file - video_url description: Message Content name: type: string description: Sender Name tool_calls: type: array items: type: object properties: id: type: string type: type: string examples: - function function: type: object properties: name: type: string arguments: type: string x-apifox-orders: - name - arguments x-apifox-orders: - id - type - function tool_call_id: type: string description: Tool Call ID (for tool role messages) reasoning_content: type: string description: Reasoning Content x-apifox-orders: - role - content - name - tool_calls - tool_call_id - reasoning_content description: List of conversation messages temperature: type: number minimum: 0 maximum: 2 default: 1 description: Sampling Temperature top_p: type: number minimum: 0 maximum: 1 default: 1 description: Nucleus sampling parameter (top_p) 'n': type: integer minimum: 1 default: 1 description: Number of completions to generate stream: type: boolean default: false description: Enable streaming response stream_options: type: object properties: include_usage: type: boolean x-apifox-orders: - include_usage stop: oneOf: - type: string - type: array items: type: string description: Stop sequences max_tokens: type: integer description: Maximum tokens for generation max_completion_tokens: type: integer description: Maximum tokens for completion presence_penalty: type: number minimum: -2 maximum: 2 default: 0 frequency_penalty: type: number minimum: -2 maximum: 2 default: 0 logit_bias: type: object additionalProperties: type: number properties: {} x-apifox-orders: [] user: type: string tools: type: array items: type: object properties: type: type: string examples: - function function: type: object properties: name: type: string description: type: string parameters: type: object description: Parameter definition in JSON Schema format properties: {} x-apifox-orders: [] x-apifox-orders: - name - description - parameters x-apifox-orders: - type - function tool_choice: oneOf: - type: string enum: - none - auto - required - type: object properties: type: type: string function: type: object properties: name: type: string x-apifox-orders: - name x-apifox-orders: - type - function response_format: type: object properties: type: type: string enum: - text - json_object - json_schema json_schema: type: object description: JSON Schema definition properties: {} x-apifox-orders: [] x-apifox-orders: - type - json_schema seed: type: integer reasoning_effort: type: string enum: - low - medium - high description: Reasoning effort level (for reasoning-capable models) modalities: type: array items: type: string enum: - text - audio audio: type: object properties: voice: type: string format: type: string x-apifox-orders: - voice - format x-apifox-orders: - model - messages - temperature - top_p - 'n' - stream - stream_options - stop - max_tokens - max_completion_tokens - presence_penalty - frequency_penalty - logit_bias - user - tools - tool_choice - response_format - seed - reasoning_effort - modalities - audio responses: '200': description: Response created successfully content: application/json: schema: type: object properties: id: type: string object: type: string examples: - chat.completion created: type: integer model: type: string choices: type: array items: type: object properties: index: type: integer message: type: object required: - role - content properties: role: type: string enum: - system - user - assistant - tool - developer description: Message Role content: oneOf: - type: string - type: array items: type: object properties: type: type: string enum: - text - image_url - input_audio - file - video_url text: type: string image_url: type: object properties: url: type: string description: Image URL or base64 encoded data detail: type: string enum: - low - high - auto x-apifox-orders: - url - detail input_audio: type: object properties: data: type: string description: Base64 encoded audio data format: type: string enum: - wav - mp3 x-apifox-orders: - data - format file: type: object properties: filename: type: string file_data: type: string file_id: type: string x-apifox-orders: - filename - file_data - file_id video_url: type: object properties: url: type: string x-apifox-orders: - url x-apifox-orders: - type - text - image_url - input_audio - file - video_url description: Message Content name: type: string description: Sender Name tool_calls: type: array items: type: object properties: id: type: string type: type: string examples: - function function: type: object properties: name: type: string arguments: type: string x-apifox-orders: - name - arguments x-apifox-orders: - id - type - function tool_call_id: type: string description: Tool Call ID (for tool role messages) reasoning_content: type: string description: Reasoning Content x-apifox-orders: - role - content - name - tool_calls - tool_call_id - reasoning_content finish_reason: type: string enum: - stop - length - tool_calls - content_filter x-apifox-orders: - index - message - finish_reason usage: type: object properties: prompt_tokens: type: integer description: Prompt tokens completion_tokens: type: integer description: Completion tokens total_tokens: type: integer description: Total tokens prompt_tokens_details: type: object properties: cached_tokens: type: integer text_tokens: type: integer audio_tokens: type: integer image_tokens: type: integer x-apifox-orders: - cached_tokens - text_tokens - audio_tokens - image_tokens completion_tokens_details: type: object properties: text_tokens: type: integer audio_tokens: type: integer reasoning_tokens: type: integer x-apifox-orders: - text_tokens - audio_tokens - reasoning_tokens x-apifox-orders: - prompt_tokens - completion_tokens - total_tokens - prompt_tokens_details - completion_tokens_details system_fingerprint: type: string x-apifox-orders: - id - object - created - model - choices - usage - system_fingerprint '400': description: Request parameter error content: application/json: schema: type: object properties: error: type: object properties: message: type: string description: Error message type: type: string description: Error type param: type: - string - 'null' description: Related parameters code: type: - string - 'null' description: Error code x-apifox-orders: - message - type - param - code x-apifox-orders: - error '429': description: Rate limit exceeded content: application/json: schema: type: object properties: error: type: object properties: message: type: string description: Error message type: type: string description: Error type param: type: - string - 'null' description: Related parameters code: type: - string - 'null' description: Error code x-apifox-orders: - message - type - param - code x-apifox-orders: - error security: - BearerAuth: [] components: securitySchemes: BearerAuth: type: http scheme: bearer description: |- Use Bearer Token authentication Format: Authorization: Bearer sk-xxxxxx ````