The Kling 3.0 series models API is now fully available Learn More Get Started Overview Quick Start Changelog API Reference General Info Rate Limits Callback Schema Video Generation Models Video Omni Text to Video Image to Video Reference to Video Motion Control Multi-elements to video Extend Video Lip Sync Avatar Text to Audio Video to Audio Text to Speech Voice Clone Image Recognize Element Effects Effect Templates NEW Video Effects Image Generation Models Image Omni Image Generation Reference to Image Extend Image AI Multi-Shot Virtual Try-On Others Query user info Pricing Billing Info Prepaid Resource Packs Protocols Privacy Policy of API Service Terms of API Service API Service Level Agreement Video Extension Create Task POST /v1/videos/video-extend cURL Copy Collapse curl --request POST \ --url https://api-singapore.klingai.com/v1/videos/video-extend \ --header 'Authorization: Bearer ' \ --header 'Content-Type: application/json' \ --data '{ "prompt": "A puppy appears", "video_id": "743211632612511839", "negative_prompt": "", "callback_url": "" }' 200 Copy Collapse { "code": 0, // Error codes; Specific definitions can be found in Error codes "message": "string", // Error information "request_id": "string", // Request ID, generated by the system, is used to track requests and troubleshoot problems "data": { "task_id": "string", // Task ID, generated by the system "task_status": "string", // Task status, Enum values: submitted, processing, succeed, failed "task_info":{ // Task creation parameters "external_task_id": "string" // Customer-defined task ID }, "created_at": 1722769557708, // Task creation time, Unix timestamp, unit: ms "updated_at": 1722769557708 //Task update time, Unix timestamp, unit: ms } } Note 1: Video extension refers to extending the duration of text-to-video/image-to-video results. Each extension can add 4 to 5 seconds, and the model and mode used cannot be selected; they must be the same as the source video. Note 2: Videos that have been extended can be extended again, but the total video duration cannot exceed 3 minutes. Request Header Content-Type string Required Default to application/json Data Exchange Format Authorization string Required Authentication information, refer to API authentication Request Body video_id string Required Video ID Supports video IDs generated by the text-to-video, the image-to-video and the video extension interface (it cannot exceed 3 minutes). Only videos generated by V1.0, V1.5, and V1.6 models are supported. Please note that based on the current cleanup policy, videos will be cleared 30 days after generation, and extension will not be possible. prompt string Optional Text Prompt Cannot exceed 2500 characters negative_prompt string Optional Negative text prompt Cannot exceed 2500 characters cfg_scale float Optional Default to 0.5 Prompt reference strength. The higher the value, the stronger the reference to the prompt. Value range: [0, 1] watermark_info object Optional Whether to generate watermarked results simultaneously Defined by the enabled parameter, format: "watermark_info": { "enabled": boolean } true: generate watermarked result, false: do not generate Custom watermarks are not currently supported callback_url string Optional The callback notification address for the task results. If configured, the server will actively notify when the task status changes. For specific message schema, see Callback Protocol external_task_id string Optional Customized Task ID User-defined task ID. It will not override the system-generated task ID, but supports querying tasks by this ID Please note that it must be unique for each user Query Task (Single) GET /v1/videos/video-extend/{id} cURL Copy Collapse curl --request GET \ --url https://api-singapore.klingai.com/v1/videos/video-extend/{task_id} \ --header 'Authorization: Bearer ' 200 Copy Collapse { "code": 0, // Error codes; Specific definitions can be found in Error codes "message": "string", // Error information "request_id": "string", // Request ID, generated by the system, is used to track requests and troubleshoot problems "data": { "task_id": "string", // Task ID, generated by the system "task_status": "string", // Task status, Enum values: submitted, processing, succeed, failed "task_status_msg": "string", // Task status information, displaying the failure reason when the task fails (such as triggering the content risk control of the platform, etc.) "task_info": { "parent_video": { //Parameters information when the task is created "id": "string", //Video ID before the extension；globally unique "url": "string", //URL for generating images(To ensure information security, generated images/videos will be cleared after 30 days. Please make sure to save them promptly.) "duration": "string" //Original video duration, unit: s (seconds) }, "external_task_id": "string" // Customer-defined task ID }, "task_result": { "videos": [ { "id": "string", // Generated video ID; globally unique, will be cleared after 30 days "url": "string", // URL for generating videos (To ensure information security, generated images/videos will be cleared after 30 days. Please make sure to save them promptly.) "watermark_url": "string", // Watermarked video download URL, anti-leech format "duration": "string" //Total video duration, unit: s (seconds) } ] }, "watermark_info": { "enabled": boolean }, "final_unit_deduction": "string", // The deduction units of task "created_at": 1722769557708, // Task creation time, Unix timestamp, unit: ms "updated_at": 1722769557708 //Task update time, Unix timestamp, unit: ms } } Request Header Content-Type string Required Default to application/json Data Exchange Format Authorization string Required Authentication information, refer to API authentication Path Parameters task_id string Optional Task ID for Video Generation. Fill the value directly in the request path. Choose either task_id or external_task_id for querying. external_task_id string Optional Customized Task ID for Video Generation. Fill the value directly in the request path. Choose either task_id or external_task_id for querying. Query Task (List) GET /v1/videos/video-extend cURL Copy Collapse curl --request GET \ --url 'https://api-singapore.klingai.com/v1/videos/video-extend?pageNum=1&pageSize=30' \ --header 'Authorization: Bearer ' 200 Copy Collapse { "code": 0, // Error codes; Specific definitions can be found in Error codes "message": "string", // Error information "request_id": "string", // Request ID, generated by the system, is used to track requests and troubleshoot problems "data": [ { "task_id": "string", // Task ID, generated by the system "task_status": "string", // Task status, Enum values: submitted, processing, succeed, failed "task_status_msg": "string", // Task status information, displaying the failure reason when the task fails (such as triggering the content risk control of the platform, etc.) "task_info": { "parent_video": { //Parameters information when the task is created "id": "string", //Video ID before the extension；globally unique "url": "string", //URL for generating images(To ensure information security, generated images/videos will be cleared after 30 days. Please make sure to save them promptly.) "duration": "string" //Original video duration, unit: s (seconds) }, "external_task_id": "string" // Customer-defined task ID }, "task_result": { "videos": [ { "id": "string", // Generated video ID; globally unique, will be cleared after 30 days "url": "string", // URL for generating videos (To ensure information security, generated images/videos will be cleared after 30 days. Please make sure to save them promptly.) "watermark_url": "string", // Watermarked video download URL, anti-leech format "duration": "string" //Total video duration, unit: s (seconds) } ] }, "watermark_info": { "enabled": boolean }, "final_unit_deduction": "string", // The deduction units of task "created_at": 1722769557708, // Task creation time, Unix timestamp, unit: ms "updated_at": 1722769557708 //Task update time, Unix timestamp, unit: ms } ] } Request Header Content-Type string Required Default to application/json Data Exchange Format Authorization string Required Authentication information, refer to API authentication Query Parameters pageNum int Optional Default to 1 Page number Value range: [1, 1000] pageSize int Optional Default to 30 Number of items per page Value range: [1, 500] Previous chapter：Multi-elements to video Next chapter：Lip Sync Create Task Query Task (Single) Query Task (List) The Kling 3.0 Series Models API is Now Fully Available – All in One, One for All！ Models Available in This Release Kling 3.0 Motion Control, Kling Video 3.0, Kling Video 3.0 Omni, Kling Image 3.0, Kling Image 3.0 Omni Refer to Key Highlights of the Models 3.0 All-in-One: A unified model for multi-modal input and output. Most powerful consistency across the universe: Subject consistency (supports cameo, subject with voice control, i2v + subject) and text consistency. Narrative control at your fingertips: More freedom, precision, and control—up to 15 seconds long, video scene cuts, ultra-high-definition storyboards/images, custom seconds. Upgraded native audio-visual output: Supports multiple speakers and languages (with accents). Kling 3.0 Motion Control Consistent Facial Identity from any angle Complex Emotions faithfully reproduced High fidelity Restoration, Even with Face Occlusions Consistent Facial Clarity Across Dynamic Framing User Guide -> Kling Video 3.0 Compared to 2.6, expected improvements: Supports subject upload in I2V scenarios for enhanced consistency Significant improvement in multi-character referencing, especially for three-person scenarios Supports Japanese, Korean, and Spanish in addition to Chinese and English Capable of generating certain dialects and accents Better distinction and control over different types of audio (speech, sound effects, BGM) Improved text retention in I2V scenarios Supports scene transitions, with up to 6 shots and customizable storyboarding User Guide -> Kling Video 3.0 Omni Compared to O1, expected improvements: Native audio-visual synchronization Supports video subject creation Further improved consistency in reference-based tasks, especially for characters and products Combined capabilities of reference + storyboarding + audio-visual sync significantly enhance usability Supports scene transitions, with up to 6 shots Extended generation duration up to 15 seconds User Guide -> Kling Image 3.0 Highly consistent feature retention Precise response to detail modifications Accurate control over style and tone Rich imaginative capabilities User Guide -> Kling Image 3.0 Omni Enhanced narrative sense New storyboard image set generation, retaining reference image features with scene relevance Direct output of 2K/4K ultra-high-definition images Further improved detail consistency User Guide -> Thank you for your support and understanding! 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