AI Video Models with 4K Output: Resolution Guide (2026)

Of the 27 AI video models we track, only 3 generate native 4K video— and the cheapest starts at $0.112 per second. That means 89% of the market tops out at 1080p or below, and the jump to 4K comes with a 2–4x price multiplier that most creators don’t need.

We tested every model’s maximum resolution output and built the complete resolution matrix below. The results reveal a clear hierarchy: native 4K is a premium tier dominated by Kling v3, LTX-2 Pro, and Veo 3.1. Two more models — Runway Gen-4 and Luma Ray 3 — offer 4K through upscaling or post-processing, not native rendering.

Prices verified: April 11, 2026.

The 3 Models with Native 4K

Kling v3 — Cheapest Native 4K ($0.112/sec)

Kling v3 is the most affordable path to true 4K AI video. At $0.112/sec (without audio), it renders native 4K with 60fps support and multi-shot generation (up to 6 shots). Adding audio bumps the price to $0.168/sec. For creators who need 4K on a budget, Kling v3 is the default choice.

LTX-2 Pro — Open Source 4K ($0.24/sec)

LTX-2 Pro is the only open-source model with native 4K output. At its 1080p tier, it costs just $0.06/secwith audio included — making it the cheapest 1080p+audio option on the market. But 4K bumps the price to $0.24/sec, a 4x multiplier. The Apache 2.0 license means you can self-host to avoid the 4K surcharge if you have the GPU capacity.

Veo 3.1 — Highest Quality 4K ($0.40–$0.60/sec)

Veo 3.1delivers the best 4K quality with Google’s state-of-the-art rendering pipeline. Without audio it costs $0.40/sec; with native lip-sync audio, $0.60/sec. That makes a 5-second 4K clip with audio cost $3.00 — the most expensive per-clip price in the market, but the quality justifies it for premium content.

4K via Upscaling (Not Native)

Runway Gen-4 — 4K Upscaling

Runway Gen-4renders natively at 720p but offers a 4K upscaling pipeline. The base model starts at $0.05/sec (Turbo) to $0.12/sec (Standard), with the upscaling step adding processing time. The result is visually sharper than 720p but lacks the fine detail of native 4K rendering — edges can appear smoothed and textures lose some subtlety compared to Kling v3 or Veo 3.1 at native 4K.

Luma Ray 3 — 4K via Hi-Fi Diffusion Mastering

Luma Ray 3uses a proprietary “Hi-Fi Diffusion” mastering step that upscales output to 4K. At $0.20 per generation (flat rate), it’s priced competitively but the 4K output is post-processed rather than natively rendered. Best suited for cases where you need higher resolution delivery but not pixel-level 4K fidelity.

Native 4K: Head-to-Head Comparison

Kling v3 doesn’t charge a separate 4K premium — its base price includes 4K capability. LTX-2 Pro has the steepest 4K multiplier at 4x.

Resolution Matrix: All 27 Models

Every AI video model we track, grouped by maximum native resolution. Models listed at their lowest available API price per second.

4K Native (3 models)

1080p Native (10 models)

720p Native (7 models)

480p and Below (7 models)

Key Insight: Most Content Doesn’t Need 4K

The resolution economics are clear: 4K multipliers cost 2–4x more than the same model at 1080p. LTX-2 Pro’s jump from $0.06 to $0.24/sec is the most dramatic example — you’re paying 4x for pixels most viewers won’t notice on a phone screen.

Consider where your content will be consumed:

• Social media (TikTok, Reels, Shorts): 1080p is the maximum display resolution. 4K is wasted bandwidth.
• Web and presentations: 1080p looks sharp on any screen. 720p is acceptable for embedded video.
• Large displays and cinema: This is where native 4K matters. Upscaled 4K (Runway, Luma) may suffice; native 4K (Kling v3, LTX-2 Pro, Veo 3.1) is preferred.
• Archival and future-proofing:If you’re building a content library, 4K preserves quality for future platforms. Kling v3 at $0.112/sec is the cost-effective choice here.

Cost Impact: 100 Clips at Each Resolution

Based on 5-second clips. Kling v3’s flat pricing makes it the clear 4K value leader.

For a complete pricing breakdown across all models and resolutions, see our AI Video Pricing Guide, or calculate your exact costs with the cost calculator.

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