Provider Runway

Runway

Mode: video · Models: 4

Official API docs: Runway API

Runway is a family of cinematic video models. The flagship Gen 4.5 unifies text-to-video and image-to-video (pass a start image to drive it from a still), Aleph restyles an existing clip (video-to-video), Gen4 Ref generates from reference images, and Avatar produces a talking-avatar clip from a preset character plus text or audio.

Models

id	Name	Input type
runway-gen4.5	Runway Gen 4.5	t2v
runway-gen4-aleph	Runway Aleph	v2v
runway-gen4-ref	Runway Gen4 Ref	i2v
runway-avatar-video	Runway Avatar	t2v

CLI

# text-to-video
gen-ai generate -m runway-gen4.5 \
  -p "a lighthouse on a storm-battered cliff, cinematic, slow dolly in" \
  --ar 16:9 -d 8

# image-to-video: drive Gen 4.5 from a start image
gen-ai generate -m runway-gen4.5 -p "slow push in, drifting fog" --image ./start.jpg -d 5

# restyle an existing clip (Aleph, video-to-video)
gen-ai generate -m runway-gen4-aleph -p "claymation style" --video ./clip.mp4

MCP

{ "name": "picsart_generate",
  "arguments": {
    "model": "runway-gen4.5",
    "prompt": "a lighthouse on a storm-battered cliff, cinematic, slow dolly in",
    "aspectRatio": "16:9",
    "duration": 8
  } }

{ "name": "picsart_generate",
  "arguments": {
    "model": "runway-gen4.5",
    "prompt": "slow push in, drifting fog",
    "imageUrls": ["https://example.com/start.jpg"],
    "duration": 5
  } }

Parameters — runway-gen4.5

Param	CLI flag	Type	Values
prompt	-p	text	required (≤ 1000 chars)
duration	-d	enum	5 · 8 · 10 (default 5)
aspectRatio	--ar	enum	16:9 · 9:16 (default 16:9)
imageUrls	-i	file	start image (max 1)

Source: gen-ai models info runway-gen4.5 --json. Gen 4.5 is a unified surface — passing a start image (imageUrls) switches it from text-to-video to image-to-video.

Pricing

gen-ai pricing runway-gen4.5 -d 8 --ar 16:9

Cost scales with duration (5 / 8 / 10 s). Gen 4.5 outputs at 1080p; aspect ratio does not change the price.