Veo 3.1 and Omni 1.2 Flash are both Google video models, but positioned completely differently: Veo 3.1 is the quality flagship, single 8s clips at ~5.7x Omni's 720p price; Omni 1.2 is volume/editing-oriented, 15s, conversational editing, cheap. On Oct 22, 2026, Veo 3.1's Gemini API preview endpoints all retired, with Omni as the official migration target — that doesn't mean Veo 3.1 was replaced; it means the API-side video line converged on Omni.
Veo 3.1: public preview Oct 15, 2025; 4/6/8s durations, 24 FPS, 720p/1080p/2160p, 16:9 and 9:16; 1080p, 4K, reference images and extension all force 8s. Omni 1.2: generation and editing 3–15s, whole-second steps, default 10s; 360p/720p/1080p/4K (1080p and 4K upscaled); aspect ratios only 16:9 and 9:16; extension 3–10s per turn, 30s total. Omni's single clip is nearly twice Veo 3.1's length and extends to 30s; Veo 3.1's 2160p is native resolution, Omni's 4K is upscaled.
Veo 3.1 pricing (Google Cloud): standard with audio $0.40/s (720p/1080p), 4K $0.60/s, silent $0.20/s; Fast $0.10/s (720p)/$0.12/s (1080p)/$0.30/s (4K); Lite $0.05/s (720p)/$0.08/s (1080p). 8s 1080p standard = $3.20. No free tier. Omni 1.2: 720p ~$0.07/s, 15s ~$1.04; 10s 720p ~$0.70. Standard Veo 3.1 costs ~5.7x Omni's 720p per second. Note a Fast-price discrepancy: Runway Dev lists $0.15/s, conflicting with Cloud's $0.10/$0.12 — this page uses Cloud's and flags the difference.
Omni 1.2's conversational editing goes through the Interactions API, referencing the previous round with previous_interaction_id; the model remembers the earlier video context and preserves unmentioned elements; each round produces a new video. Veo 3.1 has no conversational editing. Omni supports up to 6 reference images; Veo 3.1's reference-image feature forces 8s duration. Omni's first/last-frame interpolation only supports 3–10s. Veo 3.1's advantage is the picture itself — it's Google's flagship video model, and single-8s output quality is its core positioning.
On AA: the Nov 9 read had Veo 3.1's text-to-video Elo ~164 points below Omni 1.1 (datastudios.org); the Aug 2 read had Veo 3.1 at #11, Elo 1095 (howaiworks.ai, old scale, not directly comparable with November scores). Omni 1.2's AA text-to-video Elo on Nov 12 was 1154 (#6). The two models' AA scores come from reads on different dates and can't be directly compared.
Highest-quality single 8s shot: pick Veo 3.1 (standard), at $0.40/s. Volume, longer clips, multi-round editing, low price: pick Omni 1.2 — 15s, conversational editing, 720p $0.07/s. Note the channels: Veo 3.1's Gemini API preview endpoints retired Oct 22, so API-side you can only use Omni; Veo 3.1 is still usable via Google Cloud and Flow (Flow keeps Lite only after Dec 5). Google hasn't confirmed whether Omni reuses Veo architecture — any such claim is unverified.
Reference: Pandromeda — Gemini Omni vs Veo 3.1: Which One Should You Use (rewritten and organized by ModelBrief; facts per the source)