Google: veo-3.1-fast-generate-preview API

Veo-3.1-fast-generate-preview is a low-latency, high-speed iteration of the Veo 3.1 video generation family, optimized specifically for rapid iterative workflows. Built on a latent diffusion architecture with a highly distilled "Flash" transformer backbone, it is capable of generating low-resolution, high-frame-rate video previews in under 2 seconds. In 2026, it serves as the "drafting engine" for professional creators, allowing them to verify composition, lighting, and temporal consistency before committing to the heavy compute of the full Veo-Ultra model. It introduces a "Continuous Feedback Loop" feature where users can adjust prompts in real-time and see the preview update almost instantly.

• Input: text, image
• Output: audio, video
• File input: Supported
• Released: 2026-01-19
• Knowledge cutoff: 2025-11-30