Gemini Omni 1.2 Flash vs Kling 4.0

Gemini Omni 1.2 Flash is Google DeepMind's video generation and editing model, announced November 5, 2026 and generally available the same day across the Gemini API and Gemini for business [official]. It is the first Omni version to reach general availability, backed by Google Cloud's enterprise infrastructure, with Provisioned Throughput for high-volume work [official].

The headline changes against Omni 1.1: native clips grow from 10 to 15 seconds, in one-second steps from 3 to 15 [official]; multi-turn conversational editing works across full 15-second clips, so you swap a product or background, change lighting or weather, or switch aspect ratio with a follow-up prompt instead of starting over [official]; and the price drops 30% to $0.07 per second at 720p [official]. You can draft at 360p or 720p, fix a detail with an edit, then upscale the best take to 1080p or 4K [official].

The catch is access and length: the API is paid-only — no free tier [official] — and 15 seconds is still half of Kling 4.0's single take. The quality claims (better reference adherence, steadier camera motion, more natural dialogue) come with no published benchmarks [official claims; no benchmark reported], so treat them as reasons to test, not results.

Kling 4.0 is Kuaishou's consumer flagship and went fully live on October 15, 2026 [reported]. Its headline is native 30-second generation in a single pass, with up to 10 keyframes and 15 multimodal references for directing a scene, plus 21:9 alongside 16:9, 9:16 and 1:1 [reported].

Against Omni 1.2 Flash, Kling 4.0's advantages are length (30s vs 15s), resolution ceiling (4K with 10-bit HDR vs upscaled 4K), and a no-code app you can open today. Its disadvantages are unit price and editing style: $0.157 per second at 720p on the API against Omni's $0.07 [reported], and no conversational editing state — you direct with keyframes and references, not a chat [unknown]. Its developer API became fully available on October 28, 2026 [reported].

One correction to our own older pages: Kling 4.0's API is no longer "coming soon" and its price is no longer credits-only. The API rates above come from Kling's published developer pricing table, as reported by multiple independent trackers in late October and early November 2026 [reported]. Consumer subscription prices and credits are a separate schedule and are not compared here.

Gemini Omni 1.2 Flash has the clearest pricing of any model on this page: video output at $12.00 per million tokens on the Gemini API paid tier, which Google converts to about $0.07 per second at 720p [official]. A 10-second clip costs about $0.70 of video output, a 15-second clip about $1.04 [official]. The same official page lists $0.023 per second at 360p, $0.104 at 1080p with upsampling, and $0.209 at 4K with upsampling [official]. Input adds $1.50 per million tokens, and retries are fresh billed generations, so budget for more than one take per finished clip.

Kling 4.0 on its developer API is $0.157 per second at 720p and $0.235 at 1080p with no input video [reported] — a 10-second 1080p clip is about $2.35, a full 30-second take about $7.05 [reported]. With a video input the rate drops to $0.094 at 720p, but billed seconds rise because input time counts too [reported]. Kling 4.0 Flash undercuts the flagship at $0.094 per second at 720p, for 3 to 20 seconds [reported] — still above Omni's $0.07. On per-second API price, Omni 1.2 Flash is the cheapest of the three rates by a clear margin; on length per generation, Kling 4.0 is double.

The real split is workflow, not a spec row. Omni 1.2 Flash is built around a conversation: generate, look, say "change only the background", look again [official]. Kling 4.0 is built around directing: keyframes and a stack of references up front, one long take out [reported]. If your work is variants — ad versions, catalog spins, try-ons — the chat loop saves re-generations. If your work is one long directed shot, the 30-second take is the thing no edit loop replaces.

Choose Gemini Omni 1.2 Flash if you build with code and care about unit cost and iteration — API pipelines, batch generation, ad variants where each version is a follow-up prompt, not a fresh brief. At $0.07/sec it is the cheapest serious per-second rate published right now, and the no-cost try-out is Google Vids, not the API.

Choose Kling 4.0 if you want the longest single clip (30s), the highest resolution ceiling, keyframe directing inside a consumer app — or you simply don't want to write code today.

The honest caveat: no independent benchmark has run these two against each other, and Omni's consistency and camera claims are Google's own words with no numbers attached. The pricing edge, at least, is printed on Google's own pricing page — that part you can verify in thirty seconds.

This is a three-day-old model, and the search demand is an early bet. Omni 1.2 Flash shipped November 5, 2026. On November 8, Google autocomplete returned no suggestions for "gemini omni 1.2 flash api", "gemini omni 1.2 flash free", "gemini omni 1.2 flash pricing" or "gemini omni 1.2 flash vs kling 4.0" [reported] — the version-specific phrasing has no established demand yet. The family-level phrase "gemini omni flash api" does autocomplete, with pricing, key and documentation suffixes [reported], so the API intent is real and the 1.2 wording is the early part.

The comparison head term already has coverage. Searching "gemini omni 1.2 flash vs kling 4.0" on November 8 returned three independent comparison pages in the top results, and no official or brand site among them [reported] — the field is open, but it is not empty, and one of the three is already stale (written against Omni 1.1 pricing) [reported].

Kling's numbers are reported, not re-verified against Kling's own page. The Kling 4.0 API rates, launch date and API availability above come from multiple independent trackers citing Kling's official pages [reported]; this page did not re-open Kling's pricing table directly. Consumer plan prices and credits are deliberately not compared — they are a different schedule from API per-second rates.

Google names its own weak spots. The launch post says development is ongoing on fast sports action, rapid script changes and complex physics [official]. Independent testers add their own: strong on explainers, typography and single-change edits to real footage, weaker on photoreal people and cinematic brand films [reported]. Fifteen seconds is still a cap — and every edit turn re-synthesizes the clip rather than editing a timeline.