CogVideoX-Flash API

Name: CogVideoX-Flash
Brand: Zhipu AI
Availability: InStock

Generate short video clips from text prompts at zero cost. Async task API: submit a prompt, poll for completion, download the MP4. $0 per video, forever.

FREE

Per video

Clip length

480p/720p

Resolutions

Async

Task-based API

Watermark notice — Every image model on NovAI is served by a Chinese provider and burns a visible AI-generated label such as AI生成 into the corner of the output under China’s labelling rules — NovAI cannot switch it off. Video output varies by model: in our 4 August 2026 tests Seedance 2.0 and CogVideoX-Flash showed no visible label, while Hunyuan Video 1.5 is labelled. Text and chat models are not affected. Which models, and what it rules out →

Why use CogVideoX-Flash on NovAI?

Free forever - $0 per generated video clip, no platform fee
480p and 720p output - usable quality for social and preview content
6-second clips - ideal for loops, teasers, and B-roll
Simple async API - POST to create a task, GET to poll status, download when ready
No visible watermark in our tests - our 4 August 2026 tests showed no visible AI label on CogVideoX-Flash output (see notice above)

Not listed on OpenRouter - free video generation at this quality is effectively exclusive. Premium alternative on NovAI: Seedance 2.5 (up to 4K, per-second billing).

Best use cases

Social media clips and loops at zero marginal cost
Product teasers and marketing B-roll
Animation demos and storyboards in motion
Free-tier video features in your own product

Quick start

cURL - create task

curl -X POST https://aiapi-pro.com/v1/video/generations \
  -H "Authorization: Bearer $NOVAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "cogvideox-flash",
    "prompt": "A paper boat floating on a quiet pond at dusk, raindrops rippling the water",
    "resolution": "720p",
    "duration": 6
  }'

cURL - poll status

curl https://aiapi-pro.com/v1/video/generations/{task_id} \
  -H "Authorization: Bearer $NOVAI_API_KEY"

The create call returns a task_id. Poll until the task completes, then download the video URL from the response.

Works with any OpenAI-compatible SDK - just set base_url to https://aiapi-pro.com/v1 and use your NovAI API key. Full reference in the API docs.