---
source: https://autoadify.com/ai-models/runway-gen-4-5
title: "Runway Gen-4.5 for social media"
---

# Runway Gen-4.5 for social media

> Runway's Gen-4.5 text to video at 720p, up to 10 seconds. Tagged for B-roll: reel cutaways, atmosphere and product moments. Clips are silent.

Runway Gen-4.5 is one of 80+ AI models in Autoadify, the AI agent for social media. No Runway account or API key is needed: every model is in one subscription, chosen per generation — by asking the AI agent, in a social media AI workflow step, or in AI Studio.

- **Lab:** Runway
- **What it is:** Runway Gen-4.5 — text to video, 720p, up to 10s
- **Best for:** B-roll
- **Available on:** Pro plan and above
- **Cost band:** Mid, relative to its own type
- **Clip lengths:** 5, 10 seconds
- **Sound:** silent

## What to make with Runway Gen-4.5

- **Reel backgrounds** (Instagram, TikTok, YouTube): Motion behind on-screen text, so a tip or a quote becomes a reel.
- **Product motion** (Instagram, TikTok, Facebook): Product turns, close-ups and texture shots for a launch.

**Pick it when:** You want Runway's look for B-roll you will score yourself.

**Try Kling 3.0 Standard instead** for 720p B-roll that can come with sound.

## Where the clip goes

Vertical 9:16 is the native shape for short video on most platforms.

| Platform | Spec | Note |
| --- | --- | --- |
| Instagram | 1080 × 1920 | Stories & Reels: 9:16 — full screen vertical, safe zone: center 1080×1420 |
| TikTok | 1080 × 1920 | Feed Video: 9:16 full screen — primary format, always use this |
| Facebook | 1080 × 1920 | Stories: 9:16 — same as Instagram Stories |

## Alternatives

- [Veo 3.1](https://autoadify.com/ai-models/veo-3-1): Google Veo 3.1 — flagship cinematic AI video
- [Veo 3.1 Fast](https://autoadify.com/ai-models/veo-3-1-fast): Veo 3.1 at faster speed — strong quality, cheaper
- [Veo 3.1 Lite](https://autoadify.com/ai-models/veo-3-1-lite): Veo 3.1 Lite — cheapest tier, high-volume friendly
- [Grok Imagine Video](https://autoadify.com/ai-models/grok-imagine-video): xAI text-to-video

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_Source: https://autoadify.com/ai-models/runway-gen-4-5_