Kling v3 API
What is Kling v3
If you're generating a product demo or a UGC-style ad clip and need the sharpest motion quality currently available through varg's gateway, Kling v3 is the pro-tier pick. It's the latest Kling model, supporting both text-to-video and image-to-video generation. Kling is developed by Kuaishou and routed through varg via fal.ai.
Kling v3 via varg vs. calling fal.ai directly
Calling fal.ai directly means a separate fal account, a separate API key, and no automatic reuse of identical generations. Through varg, Kling v3 sits behind the same gateway as 90+ other models (Sora, Veo, Wan, Flux, ElevenLabs), billed on one credit balance, with identical prompts cached for 30 days so re-running a composition doesn't re-charge you.
Pricing
Estimated cost via varg: $6.62 per generation (billed per second of output — actual cost scales with clip length). This is varg's routed estimate for the 4K image-to-video route; the text-to-video route on the same model can differ. Check current pricing at generation time via the gateway's pricing endpoint before assuming this figure is still accurate.
Code example
curl -X POST https://api.varg.ai/v2/video \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "kling_v3",
"prompt": "slow push-in, soft studio lighting, product stays in focus",
"files": [{ "url": "https://example.com/input.jpg" }]
}'
kling_v3 is the model id in varg's live catalog. To see every input this model accepts, call GET https://api.varg.ai/v2/tools/video?model=kling_v3; see docs.varg.ai for the response shape.
When to use Kling v3 vs. other video models
Use Kling v3 when you need the highest motion fidelity Kling offers and can absorb the pro-tier cost. Use Kling v3 Standard (same family, lower cost tier) for a cheaper balance of quality and price when 4K isn't required. Use Sora 2 instead if you want OpenAI's cinematic look at a flat $1.05/generation rather than per-second billing. Use Veo 3.1 if you specifically want Google's model — varg doesn't have enough data on this catalog to state a clear quality differentiator between Veo 3.1 and Kling v3 beyond price ($3.36 vs $6.62 estimated), so treat that as a cost decision until you've tested both on your own footage.
Kling v3 API via varg vs. direct
| Direct | Via varg | |
|---|---|---|
| Separate provider account needed | Yes (fal.ai account) | No — one VARG_API_KEY |
| Combine with other models in one pipeline | Manual glue code | Built-in (same gateway, same credit balance) |
| Automatic caching of repeated generations | No | Yes — content-addressed, 30-day TTL |
| Billing | fal.ai's own billing | Credit-based, 1 credit = 1 cent |
FAQ
How much does Kling v3 cost via varg?
varg's routed estimate is $6.62 per generation for the 4K image-to-video route, billed per second of output — longer clips cost more. Confirm current pricing via the gateway before relying on this number in a cost model.
Can I use Kling v3 for image-to-video, not just text-to-video?
Yes — the model supports both text-to-video and image-to-video generation.
Do I need a separate Kling or fal.ai account to use this?
No. varg routes the request to fal.ai on your behalf; you only need a VARG_API_KEY.
Is there a cheaper Kling option through varg?
Yes — Kling v3 Standard is the same model family at a lower estimated cost, for cases that don't need the pro-tier 4K route.