What is Runway Gen-4.5 used for?

Gen-4.5 generates video from text or a starting image. Current documentation lists two-to-ten-second clips and Standard-or-higher access.

How does Aleph 2.0 differ from Gen-4.5?

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.

What does Act-Two do?

Act-Two transfers a recorded driving performance to a character. Clear footage and suitable framing help, but expressions, hands, and movement still need review.

Are Runway Free credits renewed monthly?

The pricing page checked October 8, 2026 lists 125 one-time Free credits, not a recurring monthly allowance. Model access depends on the plan.

How much does Gen-4.5 cost through the API?

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.

How much does Aleph 2.0 cost through the API?

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.

Does a Runway edit preserve everything else perfectly?

No. Preservation is an intended result, not a guarantee. Check subject identity, geometry, lighting, objects, and motion across the full edited clip.

Why budget for more seconds than the final video length?

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.

AI / Video Generation & Editing / Runway

Runway

Professional generative video platform combining Gen-4.5 text/image-to-video with references, AI editing, audio tools and developer API workflows.

Text-to-VideoImage-to-VideoAI Video EditingReferencesProduction API

Video Generation & EditingCompare this model Visit website

Max Resolution

720p native for Gen-4.5; upscale workflows available

Max Duration

2–10 seconds per Gen-4.5 generation

Generation Modes

Text-to-Video + Image-to-Video + References + Video transformation

Native Audio

No in Gen-4.5 video generation — separate Runway audio/voice tools

About Runway

Runway is a broad AI production platform rather than a single video model. Its Gen-4.5 system focuses on high-fidelity text-to-video and image-to-video generation with strong prompt adherence, while References, editing, audio and API tools extend the platform into repeatable production workflows.

Specifications

Developer & Integration

2 specifications

API Access	Yes — Runway API
Integrations	Web app · API · production workflows

Overview

4 specifications

Main Specialization	Generative AI video and production-focused creative workflows
Target Audience	B2C + B2B — creators, filmmakers, agencies and production teams
Best For	Cinematic generation · advertising · concept films · image animation and AI-assisted production
Current Model	Gen-4.5

Commercial & Business

1 specifications

Commercial Use

Yes subject to Runway terms and applicable plan/content rights

Pricing

2 specifications

Free Plan	Yes — limited free credits/tools
Pricing model	Free tier · Subscription · Credits · Usage-based API

Text-to-Video	Gen-4.5 text-to-video generation
Image-to-Video	Gen-4.5 image-to-video generation from a first-frame image
Video-to-Video	Yes — available through supported Runway models/tools
Reference-to-Video	Yes — References and image-driven workflows
First & Last Frame	Available in supported generation workflows
Video Extension	Available in supported Runway video workflows
Multi-Shot Generation	Workflow-based — create and sequence shots rather than Gen-4.5 native multi-shot
Generation Modes	Text-to-Video · Image-to-Video · References · Video transformation

Maximum Resolution	720p native for Gen-4.5; upscale workflows available
Maximum Clip Duration	2–10 seconds per Gen-4.5 generation
Frame Rate	24 fps for Gen-4.5 output
Aspect Ratios	16:9 · 9:16 · 1:1 and supported custom/model ratios
Upscaling	Yes — upscale/export workflows available

Camera Control	Prompt-driven camera movement; advanced control varies by model/tool
Motion Control	Yes — motion can be directed through prompts and specialized tools
Character Consistency	Yes — References workflows support consistent characters
Object Consistency	Yes — reference-driven consistency workflows
Style Reference	Yes — References can guide style and scene identity
Character Reference	Yes — Gen-4 References
Prompt Adherence	Strong — Gen-4.5 emphasizes prompt adherence and visual fidelity

AI Video Editing	Yes — Runway includes generative and AI-assisted video tools
Object Removal	Yes — supported AI editing workflows
Object Addition	Yes — generative/reference workflows
Background Replacement	Yes — supported compositing/generative workflows
Video Restyling	Yes — video transformation/restyling available through supported tools/models
Timeline Editor	Yes — project/editor workflows available
Text-Based Editing	AI/prompt-based editing tools available

Native Audio Generation	No in Gen-4.5 video generation — separate Runway audio/voice tools
Sound Effects	Available as separate generative audio workflow
Music Generation	Not a core Gen-4.5 video capability
Voice / Dialogue	Available through separate voice/audio workflows
Lip Sync	Yes — Lip Sync tool

Runway

About Runway

Specifications

Developer & Integration

Overview

Commercial & Business

Pricing

Generation

Quality & Output

Creative Control

Editing

Audio

Platform & Developer

Pricing & Rights

Sources & Verification

Compare Runway

Compare before you choose

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Reviews & Guides

Runway AI: Gen-4.5, Aleph 2.0 & Act-Two Guide (2026)

Web App	Runway web production workspace
Mobile App	Yes — iOS availability; web remains primary production interface

Official Website	https://runwayml.com
Developer/API URL	https://docs.dev.runwayml.com
Pricing URL	https://runwayml.com/pricing
Model Version	Gen-4.5
Last Verified	2026-10-05
Source URLs	Runway Gen-4.5 Guide · Gen-4 References Guide · Runway API · Pricing