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RunwayRunway Gen-4.5
Runway's flagship developer video model for text- and image-guided clips, with professional formats and a predictable credit-per-second base rate.
Plain-English overview
What Runway Gen-4.5 actually is
Gen-4.5 is available through Runway Dev for text-to-video and image-to-video generation. It is also one of the Runway models that can deliver ProRes, image sequences, and professional SDR/HDR formats.
The $0.12-per-second equivalent is the base generation rate. Professional formats, HDR profiles, upscaling, and other processing can add material surcharges, so production estimates should start with the final delivery format.
Good fit for
- Editorial and post-production workflows
- Text- or image-led cinematic clips
- Teams already using Runway's media APIs
Category comparison
The facts that matter for video models
These are provider-published specifications, not Cody benchmark scores. Follow the linked sources for current limits and endpoint-specific exceptions.
- Generation price
- 12 credits / sec = $0.12 / secCurrent list price per generated second or the provider's closest billing unit.
- Clip duration
- 2–10 secondsDocumented duration choices or maximum clip length.
- Maximum output
- Endpoint and output-format dependentHighest provider-documented output resolution, with relevant constraints.
- Native audio
- No native audio listedWhether the endpoint generates synchronized audio with video.
- Input modes
- Text or image to videoSupported text, image, video, reference, or motion inputs.
- Generation time
- Not publishedOnly shown when a provider publishes a range; not a Cody benchmark.
Pricing & comparisons
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Runway Gen-4.5
Runway
Estimated total (USD)
For the usage above · USD · API pricing, not a subscription
How this estimate works
Estimates exclude taxes, tools, cache storage/writes, free allowances and custom discounts. Image estimates cover output only, not prompt or reference-image charges. Quality modes differ by model. Unlisted settings are not treated as free.
API and provider access
Where to get Runway Gen-4.5
Availability
Regions and access stage
Available in the Runway developer API with text-to-video and image-to-video input.
Country and data-residency coverage depends on the Runway account and enterprise agreement.
Check live availabilityData and training
The route matters.
Data handling depends on the Runway plan and agreement. Review Runway's current terms, workspace controls, and any enterprise commitments before processing confidential media.
This is a concise reading of the cited provider material, not legal advice. A third-party gateway can have different storage, routing, training, and residency terms from the model maker's direct API.
Read the provider policyFrequently asked questions
Runway Gen-4.5 FAQ
What is Runway Gen-4.5?
Runway's flagship developer video model for text- and image-guided clips, with professional formats and a predictable credit-per-second base rate. Gen-4.5 is available through Runway Dev for text-to-video and image-to-video generation. It is also one of the Runway models that can deliver ProRes, image sequences, and professional SDR/HDR formats.
When was Runway Gen-4.5 released?
Runway Gen-4.5 was released on December 1, 2025 according to the cited provider materials.
Where can I access Runway Gen-4.5?
Available in the Runway developer API with text-to-video and image-to-video input. The access routes listed in this guide are Runway.
How much does Runway Gen-4.5 cost?
$0.12 / generated second. Runway lists 12 credits per second and sells API credits at $0.01 each. Professional and HDR formats add surcharges.
Where is Runway Gen-4.5 available?
Available in the Runway developer API with text-to-video and image-to-video input. Country and data-residency coverage depends on the Runway account and enterprise agreement.
Is my Runway Gen-4.5 API data used for training?
Data handling depends on the Runway plan and agreement. Review Runway's current terms, workspace controls, and any enterprise commitments before processing confidential media. The policy belongs to the provider route and account terms, so verify it again before production use.
Related comparisons
Head-to-head comparisons
Runway Gen-4.5 vs Sora 2
OpenAI's legacy synced-audio video model for short text- or image-guided clips—still documented, but approaching a permanent API shutdown.
Open full comparisonRunway Gen-4.5 vs Veo 3.1
Google's preview video model for text-, image-, and video-guided generation with native audio and output options up to 4K.
Open full comparisonRunway Gen-4.5 vs Veo 3.1 Fast
Google's lower-cost Veo 3.1 variant for quickly creating short video clips with native audio and output options up to 4K.
Open full comparisonRunway Gen-4.5 vs MiniMax H3 Max
fal's speed-focused post-trained version of MiniMax H3 for short video with native audio, fast 768p iteration, and text, image, or multimodal reference input.
Open full comparisonRunway Gen-4.5 vs Kling Video 3.0 Pro
Kuaishou's Pro video model delivered through fal for multi-shot text/image generation, optional native audio, references, and clips up to 15 seconds.
Open full comparisonRunway Gen-4.5 vs Kling Video 2.5 Turbo Pro
A cost-conscious Kling model on fal for fluid five- or ten-second clips generated from text or a starting image.
Open full comparisonRunway Gen-4.5 vs Grok Imagine Video 1.5
SpaceXAI's current video model for turning text, images, or references into short clips with optional generated speech and sound.
Open full comparisonRunway Gen-4.5 vs Seedance 2.5
ByteDance's current audiovisual model for coherent clips up to 30 seconds, with native sound, long-form storytelling, rich references, and targeted editing.
Open full comparisonRunway Gen-4.5 vs HappyHorse 1.1
Alibaba's unified video family for creating short clips with sound from text, a starting image, or a reference video.
Open full comparisonRunway Gen-4.5 vs LTX-2.5 Pro
Lightricks' quality-focused video model for making 720p or 1080p clips from text, images, or audio with native sound.
Open full comparisonRunway Gen-4.5 vs LTX-2.5 Fast
LTX's speed-optimized video model for text, image, or audio input, native sound, automatic duration, and output up to 4K.
Open full comparisonRunway Gen-4.5 vs LTX-2.3 Pro
LTX's mature full-workflow video model for generation plus Retake, Extend, Reframe, native audio, and first-to-last-frame control.
Open full comparison
