RunwayVideoRunway 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.
At a glance
- Type
- Video
- Lab
- Runway
- Available on
- Pro plan and above
- Cost
- Mid, for its type
- Clip lengths
- 5, 10 seconds
- Sound
- Silent; add music or a voiceover separately
- Best for
- B-roll
One of 80+ AI models in Autoadify, the AI agent for social media. No Runway account, no API key: every model is in one subscription, and you choose the model for each generation.
What to make with Runway Gen-4.5
The social media jobs Runway Gen-4.5 is a good pick for, and where each one gets posted.
Reel backgrounds
Motion behind on-screen text, so a tip or a quote becomes a reel.
Product motion
Product turns, close-ups and texture shots for a launch.
Pick Runway Gen-4.5 when
You want Runway's look for B-roll you will score yourself.
How to use Runway Gen-4.5 in Autoadify
The same model, wherever you work: ask the AI agent, automate it in a social media AI workflow, or generate it yourself in AI Studio.
AI agent for social media
Ask in plain words and name the model. The agent writes, generates and builds the schedule, and stops for your approval before anything is published.
“Create a vertical reel clip of our product on a sunlit table with Runway Gen-4.5, and write the TikTok caption.”
Learn moreSocial media AI workflow
Add a "Video" step, choose Runway Gen-4.5, and the workflow runs on a schedule or on a new store product, then publishes or saves a draft.
Learn moreAI Studio
Pick Runway Gen-4.5 from the model picker, write your prompt and generate. Switch models and run the same prompt again to compare.
Learn moreWhere the clip goes
Vertical 9:16 is the native shape for short video on most platforms.
| Platform | Spec | Note |
|---|---|---|
| 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 |
| 1080 × 1920 | Stories: 9:16 — same as Instagram Stories |
Every size, for every platform: social media image sizes
Alternatives to Runway Gen-4.5
Switching models costs nothing but a click — try the same prompt on two and keep the better result.
Veo 3.1Google Veo 3.1 — flagship cinematic AI video
Veo 3.1 FastVeo 3.1 at faster speed — strong quality, cheaper
Veo 3.1 LiteVeo 3.1 Lite — cheapest tier, high-volume friendly
Grok Imagine VideoxAI text-to-video
37 models are tagged for b-roll. See every AI model for social media
Runway Gen-4.5 for social media: questions
What is Runway Gen-4.5 best for on 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. Pick it when: you want Runway's look for B-roll you will score yourself.
Do I need a Runway account or API key to use Runway Gen-4.5?+
No. Runway Gen-4.5 is one of 80+ AI models for social media included in one Autoadify subscription. There is no Runway account to open, no API key to paste and no separate bill.
Which Autoadify plan includes Runway Gen-4.5?+
Pro plan and above. Autoadify is free to start, with no card required.
Can the AI agent for social media use Runway Gen-4.5?+
Yes. Name the model in your request — for example, "Create a vertical reel clip of our product on a sunlit table with Runway Gen-4.5, and write the TikTok caption." — and Autoadify's AI agent uses Runway Gen-4.5 for that step. If a model can't do what you asked, the agent says so rather than quietly switching to another one. Nothing is published without your approval.
Can I use Runway Gen-4.5 in a social media AI workflow?+
Yes. Add a "Video" step to an AI Workflow and choose Runway Gen-4.5 as its model. The workflow runs on a schedule or when a new Shopify or WooCommerce product appears, and publishes to your connected accounts or saves drafts for review.
How long are Runway Gen-4.5 clips?+
5, 10 seconds — you choose per generation. Every option fits Instagram Reels, TikTok and YouTube Shorts.
Does Runway Gen-4.5 generate sound?+
Silent; add music or a voiceover separately.
Runway Gen-4.5 and 80+ more AI models, one social media tool
An AI agent for social media, social media AI workflows and AI Studio, posting to Instagram, TikTok, LinkedIn, X, Facebook, YouTube, Threads and more. Free to start.