Runway Gen-4.5: Text & Image to Video Online
Bottom line
Runway Gen-4.5: text or image to video at fixed 720p, 5/8/10 seconds, 48 to 96 credits. Start from a prompt or a still image in the Text to Video tool; VdoBloom shows the exact credit cost before each Runway Gen-4.5 run, with no separate Runway account.
Runway Gen-4.5 is VdoBloom's newest Runway model, supporting both text-to-video and image-to-video from one picker. Like Gen-4 Turbo, there's no resolution selector — every clip renders at a fixed 1280×720 for 16:9, with proportional dimensions for the other four supported aspect ratios (9:16, 4:3, 3:4, 1:1). Duration is 5, 8, or 10 seconds.
It's also the most expensive Runway option on VdoBloom: 48 credits for 5 seconds, 77 credits for 8 seconds, 96 credits for 10 seconds — more than double Gen-4 Turbo's price at every matching duration, and well above Gen-3's flat 20–30 credit range. VdoBloom always shows the exact cost for your chosen duration before you generate.
Prompts are capped at 1,800 characters, same as every Runway model on VdoBloom. If Gen-4.5's price is more than you need for a given job, Gen-3 covers the same text-or-image flexibility at a fraction of the cost, trading away Gen-4.5's newer model generation for the savings.
What it costs on VdoBloom
Runway Gen-4.5 is priced flat by duration: 48 credits for 5 seconds, 77 credits for 8 seconds, 96 credits for 10 seconds — the most expensive of the three Runway models on VdoBloom at every matching length. Cost is shown before you generate and refunded automatically on failure.
Runway Gen-4.5 vs Kling 3.0 vs Veo 3.1
All three carry VdoBloom's STRICT content-filter rating. Runway Gen-4.5 is fixed-format: 720p output, 5/8/10-second durations, 48–96 credits. Kling 3.0 (kling-3.0/video) is the most flexible on paper — 3–15 seconds, std/pro/4K tiers, 5.6–26.8 credits per second. Veo 3.1 has no duration control at all on VdoBloom; every generation is a flat 40 credits (Fast) or 160 credits (High Quality) regardless of length, but it adds reference-image and frame-transition input modes the other two don't have.
There's no single winner — the right pick depends on whether duration control, resolution range, or a specific input mode (like Veo's reference images) matters most for the shot you're generating.
Common problems and how to avoid them
Online discussion around Runway's newest model centers on whether the jump in price is worth it and how it handles cinematic, narrative-style footage. Since VdoBloom doesn't control the underlying model's rendering quality, the practical advice is the same as for any premium model here: check the cost preview for your exact duration before generating (48–96 credits is a meaningful spend), and consider testing a concept at the lower 5-second/48-credit tier before committing to a 10-second run.
If a generation fails outright, VdoBloom refunds the credits automatically — that covers technical failures, not a result that renders successfully but doesn't match what you had in mind.
What creators use Runway Gen-4.5 for
- Generating from text or an image with Runway's newest model, when the output quality is worth the higher price.
- A cinematic faceless-channel style clip where 5–10 seconds of a single fixed-720p shot fits the edit.
- Comparing Runway's flagship output directly against Kling 3.0 or Veo 3.1 on the same VdoBloom credit pool.
How to use Runway Gen-4.5 on VdoBloom
- 1Open the Text to Video tool and select Runway Gen-4.5 from the model picker.
- 2Write your prompt — or upload a starting image for image-to-video.
- 3Choose your duration (5–10s), aspect ratio, review the credit cost, and generate.
Frequently asked questions
How much does Runway Gen-4.5 cost?
Flat by duration: 48 credits for 5 seconds, 77 credits for 8 seconds, 96 credits for 10 seconds — the most expensive of VdoBloom's three Runway models.
Is Runway Gen-4.5 free?
New accounts get 10 free credits, which is well short of the cheapest 5-second Gen-4.5 clip (48 credits) — you'll need a top-up to run a full generation.
Does Runway Gen-4.5 support image-to-video?
Yes — it supports both text-to-video and image-to-video from the same picker, unlike Gen-4 Turbo which is image-only.
What resolution does Runway Gen-4.5 output?
A fixed 1280×720 for 16:9, with proportional dimensions for its other aspect ratios (9:16, 4:3, 3:4, 1:1). There's no resolution selector.
What's the prompt character limit for Runway Gen-4.5?
1,800 characters — VdoBloom's limit across every Runway model.
Is Runway Gen-4.5 censored?
VdoBloom rates Runway's content filter STRICT: the provider rejects sexual, violent, or otherwise policy-violating prompts and uploads before generating.
Is Runway Gen-4.5 open source?
No, Runway is a proprietary model available only through its API.
Runway Gen-4.5 vs Kling 3.0 vs Veo 3.1 — how do they compare?
All three carry VdoBloom's STRICT content rating. Runway Gen-4.5 is fixed at 720p and 5/8/10 seconds, 48–96 credits. Kling 3.0 offers std/pro/4K tiers over 3–15 seconds, 5.6–26.8 credits/second. Veo 3.1 has no duration selector and bills a flat 40 (Fast) or 160 (High Quality) credits per generation. Pick based on which control matters most — Kling for duration and resolution range, Veo for its reference-image modes, Runway Gen-4.5 for its specific fixed-format output.