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Model infoModelsSnapshot: 15 Oct 2026

Runway / Gen-4

Gen-4.5

Video generation from text or a starting image, with optional professional delivery formats.

Video generation
availableClosed weightsVideo generation
Official documentation (opens in a new tab)Reviewed 12 Oct 2026
6 of 20 specification fields collected
Output resolution1280 × 720, 720 × 1280, 1104 × 832, 960 × 960, 832 × 1104, 1584 × 672See specification notes below
Clip duration2–10 secondsSee specification notes below
Input billingSee ratesRunway
Output billingSee ratesPublished units and conditions below

Specifications

Provider-documented facts. “Not collected” means we have not verified that field yet, not that the feature is unsupported.

Context / input limit
Not collected
Maximum output
Not collected
Input modalities
Text, ImageSource for Input modalities (opens in a new tab)
Output modalities
VideoSource for Output modalities (opens in a new tab)
Reasoning
Not collected
Tool calling
Not collected
Structured output
Not collected
Streaming
Not collected
Batch processing
Not collected
Fine-tuning
Not collected
Knowledge cutoff
Not collected
Release date
Not collected
Parameters
Not collected
Architecture
Not collected
Languages
Not collected
Context caching
Not collected
Maximum prompt characters
1,000 UTF-16 code unitsSource for Maximum prompt characters (opens in a new tab)

Prompt field limit; not a token context window.

Output resolutions
1280 × 720, 720 × 1280, 1104 × 832, 960 × 960, 832 × 1104, 1584 × 672Source for Output resolutions (opens in a new tab)

Combined endpoint options; check the chosen route for its allowed subset.

Video duration
2–10 secondsSource for Video duration (opens in a new tab)

Output duration; integer seconds.

Output formats
mp4, prores, png_sequence, hdr10, hlg, sdr_rec709_10bit, hdr_pq_12bit_master, hdr_prores, hdr_png_sequence, hdr_exr_sequence, hdr_exr_acescg_sequence_1_3, hdr_exr_acescg_sequence_2_0Source for Output formats (opens in a new tab)

Access & pricing

Prices belong to an endpoint and billing tier. A provider listing does not guarantee access for every account or region.

Runway

Provider source (opens in a new tab)
API model ID
gen4.5
Access
Public Runway API; account, API credentials, purchased credits and applicable usage limits required.
Regions
Not collected
API endpoint URL
POST /v1/image_to_videoSource for API endpoint URL (opens in a new tab)
Maximum prompt characters
1,000 UTF-16 code unitsSource for Maximum prompt characters (opens in a new tab)

Prompt field limit; not a token context window.

Output resolutions
1280 × 720, 720 × 1280, 1104 × 832, 960 × 960, 832 × 1104, 1584 × 672Source for Output resolutions (opens in a new tab)
Video duration
2–10 secondsSource for Video duration (opens in a new tab)

Output duration; integer seconds.

Output formats
mp4, prores, png_sequence, hdr10, hlg, sdr_rec709_10bit, hdr_pq_12bit_master, hdr_prores, hdr_png_sequence, hdr_exr_sequence, hdr_exr_acescg_sequence_1_3, hdr_exr_acescg_sequence_2_0Source for Output formats (opens in a new tab)

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Video generationOutput1$0.12second
Delivery add-onProRes or PNG sequence add-on2$0.05second
Delivery add-onHigh bit-depth add-on at most 4 MP3$0.20second
Delivery add-onHigh bit-depth add-on above 4 MP3$0.40second

Rate conditions

  1. API credits converted at $0.01/credit; tax may apply. Generated video duration; optional format charges are additional.
  2. API credits converted at $0.01/credit; tax may apply. Added to the base generation rate.
  3. API credits converted at $0.01/credit; tax may apply. Supported 10-bit/HDR formats only; added to base rate.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Runway

Provider source (opens in a new tab)
API model ID
gen4.5
Access
Public Runway API; account, API credentials, purchased credits and applicable usage limits required.
Regions
Not collected
API endpoint URL
POST /v1/text_to_videoSource for API endpoint URL (opens in a new tab)
Maximum prompt characters
1,000 UTF-16 code unitsSource for Maximum prompt characters (opens in a new tab)

Prompt field limit; not a token context window.

Output resolutions
1280 × 720, 720 × 1280Source for Output resolutions (opens in a new tab)
Video duration
2–10 secondsSource for Video duration (opens in a new tab)

Output duration; integer seconds.

Output formats
mp4, prores, png_sequence, hdr10, hlg, sdr_rec709_10bit, hdr_pq_12bit_master, hdr_prores, hdr_png_sequence, hdr_exr_sequence, hdr_exr_acescg_sequence_1_3, hdr_exr_acescg_sequence_2_0Source for Output formats (opens in a new tab)

Prices retain their published currencies and billing units below.

Published billing units · original currency · observed 12 Oct 2026
CategoryUsageRateUnit
Video generationOutput1$0.12second
Delivery add-onProRes or PNG sequence add-on2$0.05second
Delivery add-onHigh bit-depth add-on at most 4 MP3$0.20second
Delivery add-onHigh bit-depth add-on above 4 MP3$0.40second

Rate conditions

  1. API credits converted at $0.01/credit; tax may apply. Generated video duration; optional format charges are additional.
  2. API credits converted at $0.01/credit; tax may apply. Added to the base generation rate.
  3. API credits converted at $0.01/credit; tax may apply. Supported 10-bit/HDR formats only; added to base rate.
Pricing source (opens in a new tab)

Data & enterprise terms

Retention, training use, regional processing and enterprise terms have not been summarized for this endpoint.

Caching

Caching can reuse earlier input processing. Availability, lifetime and billing depend on the endpoint. A cache hit still generates a new response.

01 / INITIAL INPUTProcess & retain

The system processes eligible input and retains reusable state.

02 / LATER REQUESTCheck available state

Reuse depends on matching input, session state and the cache policy.

03 / CACHE HITReuse & generate

Reusing state can reduce repeated work. Any charges follow the billing rules below.

Runway

gen4.5
Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

No verified cache rate for this endpoint. An empty rate is not a zero charge.

Runway

gen4.5
Not verified
How it works
Not collected
Minimum reusable input
Not collected
Lifetime & refresh
Not collected
How to enable it
Not collected
Usage fields
Not collected
Billing rules
Not collected
Limits & data boundaries
Not collected

No verified cache rate for this endpoint. An empty rate is not a zero charge.

What the measurements say

No benchmark observations have been added for this model. We do not turn a vendor description into a performance score.

Latency and throughput depend on the host, request size, reasoning settings and load. There is no measured speed or global usage figure in this record.

The record behind the model

Why it is included

Runway identifies its own creative models as proprietary and separates them from third-party offerings. Native ownership is cross-checked against its catalog and original release pages. Older releases inherit the family classification; historical weight terms were not independently recovered.

Classification evidence (opens in a new tab)

Lifecycle dates

API availability10 Feb 2026Source (opens in a new tab)

Sources reviewed