Runway Gen-4.5: the still is the contract (5s, 10s, 50cr)
Runway Gen-4.5 is image-to-video. If the label is wrong, every second is waste.
Runway Gen-4.5 is image-to-video. If the label is wrong, every second is waste.
Runway Gen-4.5 is Runway video generation with state-of-the-art quality, cinematic motion, and precise camera controls. Categories are text-to-video and image-to-video. audio is false. Durations are 5s and 10s — two lengths, not a slider. Fifty credits is the catalog figure, billed per second. requires_image is false, which is how a 50-credit-a-second cinematic take becomes a guessing game about the bottle. The claim of this page is the image-to-video job. The still is the contract.
Five seconds or ten. Silent. Fifty credits a second.
There is no 6s, no 8s, no 15s on this slug. Write a 5-second move or a 10-second hold. Trimming a 10s file to 7s is allowed. Prompting "eight seconds of cinematic motion" is not how the enum works.
audio is false. Cinematic motion is not a soundtrack. Plan music, TTS, or a talking model before you call this the hero. Quoted dialogue in the prompt will not become a stem. If we see a mouth, this row will give you a silent face. That is not lipsync.
The AI image-to-video tool is the door for the still-first path. Runway's provider roster and best Runway model are the family. The side-by-side with Versely as a studio is Versely vs Runway. This page is only Gen-4.5: 5s / 10s, silent, 50 credits, still first.
Camera control is not a recast
The description names precise camera controls. Use them on a plate that already has the right object. A push-in on the wrong SKU is a precise look at a mistake. Lock the still on text to image until the label would print. Then spend 50 credits a second making that frame move.
Text-to-video is a listed category. Gen-4.5 will invent a scene from a paragraph. That is allowed. It is also how identity retries land on the expensive meter. Lock the still before you spend on motion is the credit argument. Image-to-video treats the still as frame one. Text-to-video treats the still as a rumour.
Aspect: 16:9, 9:16, 4:3, 3:4, 1:1, 21:9. Six shapes, including cinematic widescreen. Match the still. A 1:1 pack shot pushed into 21:9 is a crop, not a camera move.
No max_output_resolution is listed on this row. Do not invent 4K because other cinematic models have it. Generate, then upscale if the placement needs it.
If the label is wrong, stop
Every second is 50 credits. A 10-second take is a 500-credit catalog max in the matrix. That is not a reason to "just try a paragraph." It is a reason to look at the still.
If the still is almost right, edit the still. Do not reroll Gen-4.5 hoping the cap colour changes mid-move. Motion models are bad object editors. Photo editor or an edit-image row is the note on the plate. Gen-4.5 is the move after the note.
Register approved plates with reusable characters and products when the same SKU has to survive a set. Then pick 5s or 10s. Silent. Score later.
FAQ
Does Runway Gen-4.5 include native audio?
No. audio is false. You get a silent 5s or 10s clip. Plan the bed. Do not file the mute as a defect.
Do I have to upload an image?
requires_image is false, and text-to-video is a listed category. You can run from text. This page's claim is that you should not, once a still exists, because 50 credits a second is a terrible identity debugger.
Why only 5s and 10s?
That is supports_durations on this slug. Other Runway or non-Runway rows have other lists. Copying an 8s habit onto Gen-4.5 will not create an 8s option.
What do 50 credits buy?
The catalog credits figure is 50, billed per second. A 5s job and a 10s job are different totals in the matrix (250–500). You are buying cinematic silent motion, with camera control, from a still you should have locked.