Compare Runway Gen-4.5, Aleph 2.0 and Act-Two. Learn current plans, API credit costs, editing limits, and a repeatable video-production workflow.
Runway combines video generation, footage editing, and character performance tools. Its practical value is choosing the right operation for a shot: create something new, change footage you already have, or transfer an actor’s performance.
The challenge is keeping the result consistent enough to deliver. This guide covers Gen-4.5, Aleph 2.0, Act-Two, current credit costs, and a workflow built around reviewing short shots. Visit Runway for the current workspace.
| Tool | Input and task | Useful starting point |
|---|---|---|
| Gen-4.5 | Text or starting image to video | New shots and animated stills |
| Gen-4 / Turbo | Image-to-video generation | Iteration from a controlled frame |
| Aleph 2.0 | Editing existing footage | Targeted scene changes |
| Act-Two | Driving performance plus character | Performance-led animation |
Do not assume these tools are interchangeable. A performance clip communicates acting in a way that a text prompt cannot, while editing footage is different from generating a replacement shot.
Runway also offers third-party models and workflow tools. Check the selected model rather than attributing every workspace feature to Gen-4.5.
Runway introduced Gen-4.5 in December 2025. Its current creation guide lists text-to-video and image-to-video, durations from two to ten seconds, and access on Standard or higher.
A starting image can establish framing, subject appearance, and lighting. It does not guarantee that every detail survives motion.
For image-to-video, describe the action and camera movement rather than repeating everything visible in the frame. Start with one clear action before attempting several timed events.
> A woman walks slowly through a rainy neon street, the camera tracks behind her at a steady distance, reflections shimmer on the pavement, one continuous shot.
Runway’s Gen-4.5 research page acknowledges limitations including objects appearing or disappearing, effects preceding causes, and actions succeeding implausibly. Check those behaviors during review, not just the first and last frames.
Aleph 2.0 powers Edit Studio. It supports changing footage with instructions and a guided editing workflow.
The launch announcement describes using an edited frame to define the intended change, then carrying it through the video. This is useful when a desired appearance is easier to show than describe.
Specify both the change and the elements that must remain stable: for example, alter the background while retaining the subject’s clothing and movement. Treat preservation as a goal to inspect, not a guarantee.
A targeted edit can be preferable to regenerating an almost-approved shot. But if the original clip has major structural problems, editing may introduce further inconsistencies. Compare the revised footage frame by frame.
Act-Two uses a recorded performance to animate a character. It is relevant when expression and gesture matter more than broad environmental motion.
Record clear, well-lit footage with the performer visible and avoid unnecessary occlusion. Use inputs that meet the guide’s framing requirements for the type of transfer you need.
Review facial movement, hands, body proportions, and timing. A good driving performance reduces ambiguity but does not eliminate transfer artifacts. Use footage and character assets you are authorized to upload.
The pricing page, checked October 8, 2026, lists:
| Plan | Monthly billing | Annual-billing monthly equivalent | Included credits |
|---|---|---|---|
| Free | $0 | — | 125 one-time |
| Standard | $15 | $12 | 625/month |
| Pro | $35 | $28 | 2,250/month |
| Max | $95 | $76 | 9,500/month |
Free credits are not a recurring monthly allowance. Confirm current model access and plan features before subscribing.
A generated second is not a delivered second. If four ten-second attempts produce one usable shot, budget for all four attempts plus editing and finishing. Subscription comparison figures do not account for that revision rate.
Runway’s developer pricing lists credits at $0.01 each:
| API model | Credits per second |
|---|---|
| Gen-4.5 | 12 |
| Gen-4 Turbo | 5 |
| Aleph 2.0 | 28 |
| Act-Two | 5 |
Aleph 2.0 has a 56-credit generation minimum. A ten-second Gen-4.5 generation is therefore 120 credits, or $1.20 at the listed API credit price. Editing ten seconds with Aleph 2.0 adds 280 credits, or $2.80, before other operations.
Supported professional output formats can add surcharges. The page lists ProRes and PNG sequences at five extra credits per second, with separate higher charges for specified HDR formats. Check the chosen model and output format rather than assuming every export is included in its base rate.
In a December 2025 DataCamp walkthrough, the author published unfiltered Gen-4.5 tests covering physics, emotions, crowds, and cinematic scenes.
A crowded-market clip retained many requested elements but lost some people and a scooter. A cinematic example looked convincing while making the character run instead of walk.
These are useful failure cases to check, not a current ranking of all models. The article’s launch-era pricing and input limitations differ from current documentation. This guide uses official current sources for specifications and does not claim firsthand testing.
Use Runway when this generate, edit, and perform workflow fits your project. Test one short scene first, record the cost of usable results, and keep a separate finishing budget. A strong demo is a starting point; continuity and accurate details determine whether the shot is ready to publish.
Gen-4.5 generates video from text or a starting image. Current documentation lists two-to-ten-second clips and Standard-or-higher access.
Aleph 2.0 edits existing footage through Edit Studio, while Gen-4.5 generates new footage. Inspect whether edits preserve the elements you intended to keep.
Act-Two transfers a recorded driving performance to a character. Clear footage and suitable framing help, but expressions, hands, and movement still need review.
The pricing page checked October 8, 2026 lists 125 one-time Free credits, not a recurring monthly allowance. Model access depends on the plan.
The developer page lists 12 credits per second and $0.01 per credit. A ten-second generation costs 120 credits, or $1.20, before additional operations or output-format surcharges.
The listed rate is 28 credits per second with a 56-credit minimum. Editing ten seconds costs 280 credits, or $2.80 at the listed credit price, before extras.
No. Preservation is an intended result, not a guarantee. Check subject identity, geometry, lighting, objects, and motion across the full edited clip.
Retries, alternative takes, editing, and finishing consume resources even when only one take is delivered. Measure cost per usable shot rather than raw generated duration.
