Preparing for the Kling 4.0 API

Updated 2026-10-02

You cannot call Kling 4.0 yet, but you can make sure adopting it takes minutes.

1. Keep the model id in config

Never hard-code kling-v3.0-pro across your codebase. A single setting means the migration is a deploy, not a refactor.

2. Don't assume clip length

Kling 3.0 tops out at 15 seconds; 4.0 is reported at 30. Read the maximum duration from configuration per model.

3. Record a baseline

Save prompts, outputs and the per-second price you paid on Kling v3 today. On release day, replay the same prompts on 4.0 and compare quality and cost directly.

4. Keep a fallback

New models launch with limited capacity. Keep v3 (or another model) as a failover target — unpinned VideoRouter requests do this automatically across hosts.

Start with the quickstart, and see the live Kling v3 prices.