› When comparing Kling 4.0 vs Kling 3.0, the biggest shift is that the new generation doubles maximum single-shot video duration from 15 to 30 seconds while introducing complex multi-reference conditioning.
› Kling 4.0 also expands multi-language dialogue, adds multi-keyframe sequences up to 10 images, and increases prompt capacity to 8,000 tokens.
› While web, MCP, and CLI access are live now, automation developers should note that the traditional developer API does not support Kling 4.0 yet.Kuaishou officially rolled out Kling 4.0 to everyone on October 15, 2026, following an early access period for Kling 4.0 Flash that began on September 28.
› If you are building workflows or deciding whether to switch your team from the February 2026 release of Kling 3.0, explore our full coverage in the Kling 4 hub to see where the entire platform stands today.Kling 4.0 vs Kling 3.0: Core Specification DifferencesThe transition between the two generations involves significant upgrades across video length, reference inputs, and language processing.