Kling 4.0: 30s stereo clips, 15 references, MCP, but Flash capped at 720p
A rundown of Kling 4.0 specs: 30s stereo clips, up to 15 references, 10 keyframes, video editing and MCP; Flash is limited to 20s 720p without keyframes, 4K/HDR/API are pending, and Seedance 2.5 already does 30s 4K.
kling 4.0 is out and everyone's calling it the video model killer here's what it actually does: 30 second clips with stereo sound in one generation up to 15 references per task: images, videos, voices up to 10 keyframes to control the shot edit a video you already made: motion, camera, background, objects plugs into ai agents through mcp the 30s part is the headline. a year ago 8 seconds was a flex now the fine print the cheap flash version tops out at 20s and 720p, no keyframes 4k, hdr and the api are still "coming soon" it's not on any independent leaderboard yet. the reviews so far are hosted by kling itself and seedance 2.5 already does 30s with 4k so not a killer. a real contender that finally caught up on length the reel below is theirs. judge for yourself