Free AI Video API: CogVideoX Flash (2026)

Every "free AI video API" landing page turns out to be a trial with a credit card requirement. This one is actually free: NovAI runs Zhipu AI's CogVideoX Flash at $0.00 per generation as our developer on-ramp.

What you get for free

• Text-to-video generation — prompt in, MP4 out, OpenAI-style async task API.
• No credit card, no subscription — just an account.
• Studio playground: generate up to 5 videos and 20 images per day directly in NovAI AI Studio, preview instantly.

What the free tier is for

• Validating prompt ideas before spending on premium models.
• Storyboarding and concept clips.
• Learning the async video-task API pattern (create → poll → download) that every paid video model uses.

Try it in the browser (60 seconds)

1. Open aiapi-pro.com/studio.html and sign in.
2. Pick the Video tab → model shows CogVideoX Flash · FREE.
3. Type a prompt, hit generate. Previews are watermarked; downloads unlock after any top-up (from $5).

The production upgrade path

Need	Model	Price
Free prototyping	cogvideox-flash	$0
Production clips, 720p+	doubao-seedance-2.0-fast	from $0.131/s
Native audio video	doubao-seedance-2.5	from $0.14/s
Free images alongside	cogview-3-flash	$0

API shape (same as paid models)

# create task
curl -X POST https://aiapi-pro.com/v1/video/generations \
  -H "Authorization: Bearer YOUR_NOVAI_KEY" \
  -d '{"model":"cogvideox-flash","prompt":"a cat walking on neon streets"}'
# -> {"id":"task_...","status":"queued"}

# poll until complete, then download the MP4 url

When you're ready for production, the request body stays identical — only the model name changes.