DocsAPI reference API reference Qwen 4 endpoints for the Qwen relay API. 阿里百炼 POST Speech Synthesis/alibailian/api/v1/services/aigc/multimodal-generation/generation POST Generate video/alibailian/api/v1/services/aigc/video-generation/video-synthesis GET Query task (API path)/alibailian/api/v1/tasks/{task_id} GET Query tasks/alibailian/tasks/{task_id}