Kling 4.0 Flash early access: how to tell what Sume lists
Kling 4.0 Flash opened to a limited group on Sept 28 with full launch in October. On Sume, a model is callable when the live catalog lists it.
Kling says Kling 4.0 Flash became available to a limited group for early access on September 28, and that the full Kling 4.0 launches officially in October. If you are not in that group, treat it as not callable; on Sume the check is the live catalog, not a vendor announcement.
What exactly did Kling announce?
From the Kling blog read 2026-10-01: early access for Flash on Sept 28 to a limited group, with the all-new Kling 4.0 launching in October as part of the lineup.
How do I tell what is callable on Sume?
| Signal | What the docs say |
|---|---|
| Provider gating | A Motion Transfer model is documented as listed only when its provider is configured |
| Limits | Not uniform; seedance-2.5 takes 4-30 seconds, other catalog models top out at 15 |
| Sizing | Each model advertises supported_resolutions |
What should I do while waiting?
Build against the models the catalog returns now and read limits from it rather than hard-coding them. Which Kling model Sume lists today is covered in Kling 4.0 API availability; the video docs describe the endpoint.
Will Sume list Kling 4.0 in October?
No Sume page cited here promises a date. Re-read the catalog after Kling's launch instead of assuming.
Sources
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