Model comparison
Compare Runway Gen-4.5 and Kling Video 3.0 Pro using the same provider-sourced video generation rubric. No mystery score and no invented benchmark ranking.
Facts checked September 4, 2026
Set your usage. Your estimate updates as you type.
Example: 8-second, 720p clips with audio. Models that do not support these settings will not receive an estimate.
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
| Model | Access | Estimated total (USD) |
|---|---|---|
| Kling Video 3.0 ProKuaishou | Kuaishou | No reviewed rate |
| Runway Gen-4.5Runway | Runway | No reviewed rate |
Quick take
Runway's flagship developer video model for text- and image-guided clips, with professional formats and a predictable credit-per-second base rate.
Format surcharges can exceed the base generation cost, and the provider does not publish one render-time number across settings.
Kuaishou's Pro video model delivered through fal for multi-shot text/image generation, optional native audio, references, and clips up to 15 seconds.
Audio, voice control, elements, motion control, and 4K variants have different rates. Treat the endpoint path as part of the product choice.
Compare the published facts
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| Video generation | Runway Gen-4.5 | Kling Video 3.0 Pro |
|---|---|---|
| Generation priceCurrent list price per generated second or the provider's closest billing unit. | 12 credits / sec = $0.12 / sec | $0.112/s no audio · $0.168/s audio |
| Clip durationDocumented duration choices or maximum clip length. | 2–10 seconds | Up to 15 seconds |
| Maximum outputHighest provider-documented output resolution, with relevant constraints. | Endpoint and output-format dependent | Endpoint dependent; separate 4K variant |
| Native audioWhether the endpoint generates synchronized audio with video. | No native audio listed | Optional, including multi-speaker controls |
| Input modesSupported text, image, video, reference, or motion inputs. | Text or image to video | Text, image, elements, motion control |
| Generation timeOnly shown when a provider publishes a range; not a Cody benchmark. | Not published | Not published |
How to choose
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
Data handling depends on the Runway plan and agreement. Review Runway's current terms, workspace controls, and any enterprise commitments before processing confidential media.
Provider and API links
fal stores request inputs and outputs by default. The X-Fal-Store-IO: 0 request header prevents payload storage, but uploaded CDN files can remain accessible and need separate lifecycle handling.
Provider and API links
Frequently asked questions
Runway Gen-4.5: Runway's flagship developer video model for text- and image-guided clips, with professional formats and a predictable credit-per-second base rate. Kling Video 3.0 Pro: Kuaishou's Pro video model delivered through fal for multi-shot text/image generation, optional native audio, references, and clips up to 15 seconds.
Consider Runway Gen-4.5 when your priority is Editorial and post-production workflows. Consider Kling Video 3.0 Pro when your priority is Multi-shot short-form storytelling. Test both with your own data and provider route before committing.
No. This comparison aligns provider-published facts for the Video generation category. It does not claim a universal winner or combine incompatible third-party benchmark scores.
