{ "openapi": "3.1.0", "info": { "title": "Runware API - Kimi K2.6", "summary": "Open frontier multimodal LLM for coding, long-horizon execution, and tool-rich workflows", "description": "Kimi K2.6 is Moonshot AI's latest flagship open model for coding, reasoning, multimodal understanding, and agentic execution. It is designed for long-horizon software tasks, reliable tool use, autonomous multi-step workflows, coordinated agent swarms, and visual understanding across image and video inputs in addition to text.", "version": "1.0.0", "x-model-id": "moonshotai-kimi-k2-6", "x-status": "coming-soon", "x-creator": { "id": "moonshot-ai", "name": "Moonshot AI", "logo": "https://assets.runware.ai/85bd63f8-b304-4c9d-9ade-265dc004626e.png" }, "x-capabilities": [ "text-to-text", "image-to-text", "video-to-text" ], "x-released-at": "2026-04-20T00:00:00Z", "x-cover-image": "https://assets.runware.ai/9aab6f12-68d6-41be-9636-1af92505dc9e.jpeg" }, "servers": [ { "url": "https://api.runware.ai/v1", "description": "Runware REST API" } ], "components": { "securitySchemes": { "apiKeyAuth": { "type": "http", "scheme": "bearer", "description": "Runware API Key (e.g., Bearer )" } }, "schemas": { "AuthenticationTask": { "title": "Authentication", "description": "Authenticates a connection using an API key. Can be sent as the first element of the request array as an alternative to using the Authorization header.", "type": "object", "x-response-schema": "https://schemas.runware.ai/responses/utilities/authentication.json", "properties": { "taskType": { "const": "authentication", "title": "Task Type", "description": "The type of task to perform." }, "apiKey": { "title": "API Key", "description": "Your Runware API key.", "type": "string" }, "connectionSessionUUID": { "title": "Connection Session UUID", "description": "Optional session UUID to resume a previous connection and receive any buffered results.", "type": "string", "format": "uuid" } }, "required": [ "taskType", "apiKey" ], "additionalProperties": false }, "RequestBody": { "type": "array", "items": { "type": "object", "properties": { "model": { "title": "Model", "description": "Identifier of the model to use for generation.", "type": "string", "const": "moonshotai:kimi@2.6" }, "inputs": { "title": "Inputs", "description": "The unified payload wrapper for complex media assets dictating image, video or audio inference constraints.", "type": "object", "properties": { "images": { "title": "Images", "description": "Array of image inputs (UUID, URL, Data URI, or Base64).", "type": "array", "minItems": 1, "items": { "title": "Image", "description": "Image input (UUID, URL, Data URI, or Base64).", "type": "string", "anyOf": [ { "format": "uuid" }, { "format": "uri" }, { "pattern": "^data:image\\/[a-zA-Z]+;base64,[a-zA-Z0-9+/=]+$" }, { "pattern": "^[a-zA-Z0-9+/=]+$" } ] } }, "videos": { "title": "Videos", "description": "Array of video inputs (UUID, URL, or Base64).", "type": "array", "minItems": 1, "items": { "title": "Video", "description": "Video input (UUID or URL).", "type": "string", "anyOf": [ { "format": "uuid" }, { "format": "uri" } ] } } }, "additionalProperties": false }, "seed": { "title": "Seed", "description": "Random seed for reproducible generation. When not provided, a random seed is generated in the unsigned 32-bit range.", "type": "integer", "minimum": 0, "maximum": 9223372036854776000 }, "settings": { "title": "Settings", "description": "Global inference settings.", "type": "object", "properties": { "systemPrompt": { "title": "System Prompt", "description": "System-level instruction that guides the model's behavior and output style across the entire generation.", "type": "string", "minLength": 1, "maxLength": 50000 }, "temperature": { "title": "Temperature", "description": "Controls randomness in generation. Lower values produce more deterministic outputs, higher values increase variation and creativity.", "type": "number", "multipleOf": 0.01, "minimum": 0, "maximum": 2, "default": 1 }, "topP": { "title": "Top-P", "description": "Nucleus sampling parameter that controls diversity by limiting the probability mass. Lower values make outputs more focused, higher values increase diversity.", "type": "number", "multipleOf": 0.01, "minimum": 0, "maximum": 1, "default": 1, "exclusiveMinimum": 0 }, "frequencyPenalty": { "title": "Frequency Penalty", "description": "Penalizes tokens based on their frequency in the output so far. A value of 0.0 disables the penalty.", "type": "number", "multipleOf": 0.01, "minimum": -2, "default": 0, "maximum": 2 }, "maxTokens": { "title": "Max Tokens", "description": "Maximum number of tokens to generate in the response.", "type": "integer", "minimum": 1, "maximum": 1000000 }, "minP": { "title": "Min-P", "description": "Minimum probability threshold. Tokens with probability below this value are excluded from sampling.", "type": "number", "multipleOf": 0.01, "minimum": 0, "maximum": 1, "default": 0 }, "presencePenalty": { "title": "Presence Penalty", "description": "Encourages the model to introduce new topics. A value of 0.0 disables the penalty.", "type": "number", "multipleOf": 0.01, "minimum": -2, "default": 0, "maximum": 2 }, "promptCacheKey": { "title": "Prompt Cache Key", "description": "Cache key for reusing prompt cache across requests. Requests sharing the same key reuse cached prompt processing.", "type": "string" }, "repetitionPenalty": { "title": "Repetition Penalty", "description": "Penalizes tokens that have already appeared in the output. A value of 1.0 disables the penalty.", "type": "number", "multipleOf": 0.01, "minimum": 0.01, "default": 1, "maximum": 5 }, "stopSequences": { "title": "Stop Sequences", "description": "Array of sequences that will cause the model to stop generating further tokens when encountered.", "type": "array", "items": { "type": "string", "minLength": 1 }, "maxItems": 16 }, "thinkingLevel": { "title": "Thinking Level", "description": "Controls the depth of internal reasoning the model performs before generating a response.", "type": "string", "enum": [ "none", "low", "medium", "high", "xhigh" ], "default": "none" }, "topK": { "title": "Top-K", "description": "Top-K sampling parameter that limits the number of highest-probability tokens considered at each step.", "type": "integer", "minimum": 0, "default": 0, "maximum": 999 } }, "additionalProperties": false }, "messages": { "title": "Messages", "description": "Array of chat messages forming the conversation context.", "type": "array", "minItems": 1, "items": { "title": "Message", "description": "A single chat message with a role and content.", "type": "object", "properties": { "role": { "title": "Role", "description": "The role of the message author.", "type": "string", "enum": [ "user", "assistant" ] }, "content": { "title": "Content", "description": "The text content of the message.", "type": "string", "minLength": 1 } }, "required": [ "role", "content" ], "additionalProperties": false } }, "toolChoice": { "title": "Tool Choice", "description": "Controls how the model selects which tool to call. This only takes effect when `tools` are defined.\n\n**Examples**:\n\n**Let the model decide (default):**\n\n```json\n\"toolChoice\": {\n \"type\": \"auto\"\n}\n```\n\n**Force a specific tool call:**\n\n```json\n\"toolChoice\": {\n \"type\": \"tool\",\n \"name\": \"get_weather\"\n}\n```\n\n**Require any tool call:**\n\n```json\n\"toolChoice\": {\n \"type\": \"any\"\n}\n```\n\n[Read full documentation](https://runware.ai/docs/models/moonshotai-kimi-k2-6#toolChoice)", "type": "object", "properties": { "type": { "title": "Type", "description": "Strategy the model uses to decide when and which tools to call.", "type": "string", "oneOf": [ { "const": "auto", "description": "The model decides whether to call a tool based on the conversation context. This is the recommended default." }, { "const": "any", "description": "The model must call at least one tool but chooses which one. Useful when you always need structured output." }, { "const": "tool", "description": "The model must call the specific tool identified by `name`. Use this to force a particular function call." }, { "const": "none", "description": "The model will not call any tool, even if tools are defined. Useful for forcing a text-only response." } ] }, "name": { "title": "Name", "description": "Name of the specific tool the model must call. Required when type is `tool`.", "type": "string" } }, "required": [ "type" ], "if": { "properties": { "type": { "const": "tool" } } }, "then": { "required": [ "name" ] }, "additionalProperties": false }, "tools": { "title": "Tools", "description": "An array of tool definitions that the model may call during generation. The model can invoke one or more tools based on the conversation context, outputting structured calls with arguments instead of (or alongside) free-text.\n\nFor `function` tools, each definition requires:\n\n- **`type`**: `\"function\"`\n- **`name`**: Unique identifier (alphanumeric, hyphens, underscores; max 64 chars).\n- **`description`**: What the function does. The model uses this to decide when to call it.\n- **`schema`**: JSON Schema object describing the expected input arguments.\n\n> [!NOTE]\n> The `search` tool is executed server-side by the provider. You don't need to handle the tool result yourself.\n\n> [!NOTE]\n> The `codeInterpreter` tool is executed server-side by the provider. You don't need to handle the tool result yourself.\n\n**Examples**:\n\n**Function tool, weather lookup:**\n\n```json\n\"tools\": [\n {\n \"type\": \"function\",\n \"name\": \"get_weather\",\n \"description\": \"Get current weather for a city\",\n \"schema\": {\n \"type\": \"object\",\n \"properties\": {\n \"city\": { \"type\": \"string\", \"description\": \"City name\" }\n },\n \"required\": [\"city\"]\n }\n }\n],\n\"toolChoice\": { \"type\": \"auto\" }\n```\n\n**Built-in web search:**\n\n```json\n\"tools\": [\n { \"type\": \"search\" }\n]\n```\n\n**Built-in code interpreter:**\n\n```json\n\"tools\": [\n { \"type\": \"codeInterpreter\" }\n]\n```\n\n**Multiple function tools:**\n\n```json\n\"tools\": [\n {\n \"type\": \"function\",\n \"name\": \"search_products\",\n \"description\": \"Search the product catalog by query and filters.\",\n \"schema\": {\n \"type\": \"object\",\n \"properties\": {\n \"query\": { \"type\": \"string\" },\n \"category\": { \"type\": \"string\" }\n },\n \"required\": [\"query\"]\n }\n },\n {\n \"type\": \"function\",\n \"name\": \"add_to_cart\",\n \"description\": \"Add a product to the user's shopping cart.\",\n \"schema\": {\n \"type\": \"object\",\n \"properties\": {\n \"productId\": { \"type\": \"string\" },\n \"quantity\": { \"type\": \"integer\", \"minimum\": 1 }\n },\n \"required\": [\"productId\"]\n }\n }\n]\n```\n\n[Read full documentation](https://runware.ai/docs/models/moonshotai-kimi-k2-6#tools)", "type": "array", "minItems": 1, "items": { "type": "object", "properties": { "type": { "title": "Type", "description": "The kind of tool to make available to the model. User-defined functions require `name` and `schema`, while built-in tools (`search`, `codeInterpreter`) are executed server-side by the provider.", "type": "string", "oneOf": [ { "const": "function", "description": "User-defined function tool. The model outputs the tool name and arguments. You execute the function locally and send results back." }, { "const": "search", "description": "Built-in web search. The provider executes search server-side and enriches the response automatically." }, { "const": "codeInterpreter", "description": "Built-in code execution sandbox (Python). The provider runs code server-side and returns results automatically." } ] }, "name": { "title": "Name", "description": "Unique function name. Required for function tools.", "type": "string", "pattern": "^[a-zA-Z0-9_-]+$", "maxLength": 64 }, "description": { "title": "Description", "description": "Explanation of what the function does, used by the model to decide when to call it.", "type": "string" }, "schema": { "title": "Schema", "description": "JSON Schema object describing the function's input parameters.", "type": "object", "additionalProperties": false } }, "required": [ "type" ], "allOf": [ { "if": { "properties": { "type": { "const": "function" } } }, "then": { "required": [ "name", "schema" ] } } ], "additionalProperties": false } }, "taskType": { "title": "Task Type", "description": "Identifier for the type of task being performed", "type": "string", "const": "textInference" }, "taskUUID": { "title": "Task UUID", "description": "UUID v4 identifier for tracking tasks and matching async responses. Must be unique per task.", "type": "string", "format": "uuid" }, "webhookURL": { "title": "Webhook URL", "description": "Specifies a webhook URL where JSON responses will be sent via HTTP POST when generation tasks complete. For batch requests with multiple results, each completed item triggers a separate webhook call as it becomes available.", "type": "string", "format": "uri" }, "includeCost": { "title": "Include Cost", "description": "Include task cost in the response.", "type": "boolean", "default": false }, "outputFormat": { "title": "Output Format", "description": "Specifies the file format of the generated output. The available values depend on the task type and the specific model's capabilities.\n\n- \\`JPG\\`: Best for photorealistic images with smaller file sizes (no transparency).\n- \\`PNG\\`: Lossless compression, supports high quality and transparency (alpha channel).\n- \\`WEBP\\`: Modern format providing superior compression and transparency support.\n- \\`MP4\\`: Widely supported video container (H.264), recommended for general use.\n- \\`WEBM\\`: Optimized for web delivery.\n- \\`MOV\\`: QuickTime format, common in professional workflows (Apple ecosystem).\n- \\`GIF\\`: Animated image format (no audio), suitable for short loops or previews.\n- \\`MP3\\`: Compressed audio, smaller file size.\n- \\`WAV\\`: Uncompressed, high-quality audio.\n- \\`FLAC\\`: Lossless compression.\n- \\`OGG\\`: Open-source compressed audio format (Vorbis codec).\n- \\`SVG\\`: Scalable Vector Graphics.\n- \\`TIFF\\`: High-quality output supporting layers.\n- \\`GLB\\`: Binary glTF format for 3D models, including geometry, textures, and PBR materials.\n\n> [!NOTE]\n> \\*\\*Transparency\\*\\*: If you are using features like background removal or LayerDiffuse that require transparency, you must select a format that supports an alpha channel (e.g., \\`PNG\\`, \\`WEBP\\`, \\`TIFF\\`). \\`JPG\\` does not support transparency.\n\n[Read full documentation](https://runware.ai/docs/models/moonshotai-kimi-k2-6#outputFormat)", "type": "string", "enum": [ "TEXT" ], "default": "TEXT" }, "deliveryMethod": { "title": "Delivery Method", "description": "Determines how the API delivers task results.", "type": "string", "oneOf": [ { "const": "sync", "description": "Returns complete results directly in the API response." }, { "const": "async", "description": "Returns an immediate acknowledgment with the task UUID. Poll for results using getResponse." }, { "const": "stream", "description": "Streams results token-by-token as they are generated." } ], "default": "sync" }, "numberResults": { "title": "Number of Results", "description": "Number of results to generate. Each result uses a different seed, producing variations of the same parameters.", "type": "integer", "minimum": 1, "default": 1, "maximum": 4 }, "includeUsage": { "title": "Include Usage", "description": "Include token usage statistics in the response.", "type": "boolean", "default": false } }, "additionalProperties": false, "required": [ "taskType", "taskUUID", "model", "messages" ] }, "description": "You must always POST an array of task objects." }, "ResponseBody": { "type": "object", "properties": { "data": { "type": "array", "items": { "type": "object", "description": "Unknown response structure" } } } }, "ErrorResponse": { "title": "Error Response", "description": "Standard error response returned by the Runware API.", "type": "object", "properties": { "errors": { "type": "array", "items": { "type": "object", "required": [ "code", "message" ], "additionalProperties": true, "properties": { "code": { "type": "string", "description": "A short identifier for the error (e.g., invalidApiKey, timeoutProvider)." }, "message": { "type": "string", "description": "A human-readable explanation of what went wrong." }, "parameter": { "type": "string", "description": "The request parameter related to the error, if applicable." }, "taskType": { "type": "string", "description": "The task type of the request that failed." }, "taskUUID": { "type": "string", "description": "The unique identifier of the failed request." }, "documentation": { "type": "string", "description": "A link to relevant documentation." } } } } }, "required": [ "errors" ], "additionalProperties": false } } }, "paths": { "/": { "post": { "summary": "Run Kimi K2.6", "description": "Kimi K2.6 is Moonshot AI's latest flagship open model for coding, reasoning, multimodal understanding, and agentic execution. It is designed for long-horizon software tasks, reliable tool use, autonomous multi-step workflows, coordinated agent swarms, and visual understanding across image and video inputs in addition to text.", "operationId": "run_moonshotai_kimi_k2_6", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/RequestBody" } } } }, "responses": { "200": { "description": "Successful response", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ResponseBody" } } } }, "400": { "description": "Bad Request — Missing or invalid parameters.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } }, "401": { "description": "Unauthorized — No valid API key provided.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } }, "402": { "description": "Payment Required — Insufficient account balance.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } }, "403": { "description": "Forbidden — The API key lacks permissions for this request.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } }, "429": { "description": "Too Many Requests — Rate limit exceeded.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } }, "500": { "description": "Server Error — Something went wrong on Runware's end.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } }, "503": { "description": "Service Unavailable — Temporarily unavailable (maintenance or capacity).", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ErrorResponse" } } } } } } } }, "security": [ { "apiKeyAuth": [] } ] }