Runway Gen-4.5 API

Runway Gen-4.5 is a text to video and image to video model by Runway, available on the Venice API as runway-gen4-5-text. Requests are anonymized, so the provider never sees your identity.

Runway Gen-4.5 API pricing

Model ID	Variant	Privacy	Price
`runway-gen4-5-text`	Text to video	Anonymized	from $0.16 per second
`runway-gen4-5`	Image to video	Anonymized	from $0.16 per second

Runway Gen-4.5 specifications

Spec	Value
Provider	Runway
Released	Apr 12, 2026
Privacy	Anonymized
Modes	text to video and image to video
Durations	2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s, 10s
Aspect ratios	16:9, 9:16
Audio	None

How to use the Runway Gen-4.5 API

Send requests to POST https://api.venice.ai/api/v1/video/queue with "model": "runway-gen4-5-text" and your API key.

# 1. Queue the job (returns a queue_id)
curl https://api.venice.ai/api/v1/video/queue \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "runway-gen4-5-text",
    "prompt": "Slow aerial drone shot over a misty mountain valley at golden hour",
    "duration": "5s",
    "aspect_ratio": "16:9"
  }'

# 2. Poll until the MP4 is ready
curl https://api.venice.ai/api/v1/video/retrieve \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "model": "runway-gen4-5-text", "queue_id": "<queue_id>" }' --output video.mp4

Runway Gen-4.5 API FAQ

How much does the Runway Gen-4.5 API cost?

From

0.16 to

0.16 per second of video, depending on resolution, duration and audio. A 5-second clip costs $0.81. Call POST /video/quote for the exact price before queueing. Prices are in USD and can be paid in DIEM at parity.

What is the Runway Gen-4.5 model ID?

Use runway-gen4-5-text as the model parameter. Other variants: runway-gen4-5 (Image to video).

Is the Runway Gen-4.5 API private?

Runway Gen-4.5 is anonymized: Venice forwards requests to the provider without your identity, but the provider may retain prompt data, so use a private model for sensitive work.

What resolutions and durations does Runway Gen-4.5 support?

Durations: 2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s, 10s. Aspect ratios: 16:9, 9:16. Audio: none.

Which endpoint does the Runway Gen-4.5 API use?

Queue a job with POST /video/queue, then poll /video/retrieve for the result.

Related models

Grok Imagine API: from $0.06 per second
PixVerse C1 API: from $0.03 per second
Topaz Video Upscale API: Priced by source video length (use /video/quote)
Kling O3 4K API: from $0.46 per second

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