Veo 3.1 Google Video API: Complete Developer Tutorial (2026) TL;DR: Veo 3.1 is Google DeepMind's latest video generation model, and it does something no other major video API does out of the box: it generates synchronized audio alongside video — dialogue, ambient sound, sound effects — in a single generation pass. Available through ofox's unified API alongside Sora 2 Pro and Kling 2.6 Pro, Veo 3.1 outputs 1080p and 4K video with camera movement controls and scene-level prompt adherence. This guide covers authentication, working code, and what to expect. What Veo 3.1 Actually Is Veo 3.1 is Google DeepMind's flagship video generation model, announced in early 2026 as an upgrade to Veo 3. The headline difference from every other video API on the market: native audio generation . It produces synchronized sound effects, ambient noise, and dialogue alongside the video frames — no separate audio model or post-processing step required. Under the hood it's a diffusion-based model trained on video-audio pairs.…