Kling 4.0 Flash
The fast Kling 4.0 tier — 3–20 second 720p clips for frequent creation, in early access now.
About
Kling 4.0 Flash opened to Ultra Yearly subscribers in early access on September 28, 2026, as the fast tier of Kuaishou's Kling 4.0 family. It generates 3 to 20 second clips at up to 720p in 8-bit SDR, positioned for frequent creation and fast-turnaround social and digital content.
The full Kling 4.0 model is planned for October 2026 with no exact date published: up to 30 seconds in a single pass, 720p/1080p/4K output, 10 keyframes, 15 multimodal reference assets, 8,000-token prompt depth, 10-bit HDR, 21:9 ultrawide, and dialogue across nine languages. Until Kling publishes the full model's limits and pricing, treat announced features as planned.
No API pricing has been published for either tier, no benchmark scores exist, and the full model has not been rated independently because it has not shipped. Early access costs are visible only inside an Ultra Yearly account ($1,429.99/year per third-party reporting).
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
No independent ratings; full model not yet shipped.
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 7/10
The September 28, 2026 early access and Flash/4.0 spec split are corroborated across Kling's announcement and multiple independent outlets with consistent figures. Docked for: (1) the full model has not shipped, so its specs are announced-not-verified; (2) no independent ratings or benchmarks for either tier; (3) no published pricing for Flash or 4.0; (4) proprietary with no weights.
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 8.0/10
- Maintenance · recency, releases, issue load
- 8.0/10
- Openness · license + docs
- 2.0/10
- Manual review · sanity read + red-flag check
- 7.0/10
- · Adoption 8: Kuaishou announcement (Sept 28, 2026) corroborated by multiple outlets; Flash in early access for Ultra Yearly subscribers
- · Maintenance 8: Kling is an established, revenue-generating video business; full 4.0 planned October 2026
- · Openness 2: proprietary, no weights, no public API for 4.0
- · Manual 7: Flash/4.0 spec split verified; docked because full-model specs are announced-not-verified and pricing unpublished