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Veo 3.1 or Runway Gen-4.5: which one for a professional production pipeline
Veo 3.1 delivers synchronised audio and 4K resolution, and Gen-4.5 lacks both parameters: 720p and no audio output. In exchange, Gen-4.5 offers lower operating cost and an integrated editing environment. If the video is the finished product of the pipeline, Veo; if it is one component in a larger edit project, Runway.
Specifications where both sides have a verified figure on record
| Runway Gen-4.5 | Veo 3.1 | |
|---|---|---|
| API model ID | gen4.5 | veo-3.1-generate-preview |
| Input | text, image | text, image |
| Output | video | video, audio |
| Where it ships | Runway API, Runway Creative | Gemini API, Runway API |
| Longest clip in one pass | 10 seconds | 8 seconds |
| Resolution ceiling | 720p | 4K |
| Vertical resolution | 720 lines of vertical resolution | 2,160 lines of vertical resolution |
| Native audio | no | yes |
A row where one side lacks a verified figure is dropped from the table entirely, because a half-empty row biases the reader toward the filled side.
The widest specification gap in our whole table
Veo 3.1 reaches 2160 lines and generates synchronised audio output. Gen-4.5 stays at 720 lines and produces no audio at all. On paper this is a one-sided advantage, and the video category ranking records the same: 40 points for Veo against 2.7 points for Gen-4.5.
But the rank is not the whole equation
Runway publishes an API rate for Gen-4.5 of $0.12 per second, against $0.40 for standard Veo at the same 720p. For equal quality, Veo's operating cost runs more than three times higher. If your pipeline output is short silent clips with audio added at a later stage, that difference becomes significant at volume.
One column neither system fills
Generation time. Neither Google nor Runway publishes processing time per clip, so this parameter is not entered into our ranking at all and does not appear in the table above. We left this column empty on purpose, rather than fill it with an unsourced figure we happened to observe once.
This is the right pick if Runway Gen-4.5
- Cost per second is the deciding parameter and 720p is sufficient for your requirement.
- The clip is one component in a larger edit project and you place the audio separately in the pipeline.
- You operate on Runway infrastructure and want generation and editing in one integrated system.
This is the right pick if Veo 3.1
- You require output with audio and do not want a separate voice-generation stage in the pipeline.
- The output has to be 4K.
- You are calling the system from within the Gemini API and the rest of your infrastructure is on Google.
Frequently raised questions, with documented answers
Why does Gen-4.5 rank so low
It loses three of the five ranking columns: resolution, reference inputs and controls. Our ranking counts only parameters with a published source, and Runway does not publish a reference-input count for Gen-4.5, so that column stays unverified and scores nothing.
Does Seedance also run on Runway infrastructure
Yes. Runway also serves Seedance 2.5 and Veo 3.1 through its own API, and that is exactly what made the price comparison possible: all three systems are priced alongside each other in one dollar-denominated list.