Hosted video models, hands on

Member lesson

Runway, and its API

Lesson 7 of 10 in Hosted video models, hands on.

Checked against the makers' documentation on 25 September 2026.

Introducing Gen-4.5 Image to Video | Runway · Runway
Lesson

Runway's API has quietly become a gateway. Its model list on docs.dev.runwayml.com has Runway's own Gen-4.5, Gen-4 Turbo, Aleph 2 for editing video and Act-Two for performance, and beside them sixteen video models in all, including Veo 3.1, Veo 3.1 Fast, Gemini Omni Flash, Seedance 2, Hailuo 3, Wan 3 and Grok Imagine. You pay in Runway credits at $0.01 each, bought in advance with a $10 minimum, and every model is priced per second of output.

your coderunway api · 1¢creditscredits a secondgen-4.512gen-4 turbo5aleph 228veo 3.140veo 3.1 fast15omni flash10veo fast direct from google: 10¢ a secondone key, many models, a margin on each
Runway as a gateway: your code calls the Runway API, paid in credits at one cent each, which runs several makers' models at different credits per second; Google direct is ten cents a second for Veo Fast at 720p.
An ink drawing of a railway station hall with a yellow booth and a clerk in the foreground, and trains of different colours waiting at platforms beyond.
One counter, many makers' trains: a single API in front of several models.
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Check what stuck

Members only

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Members answer these 3 questions and keep the ticket for this lesson. Every lesson has one.

  1. Question 1, locked

    Which of these words means this? “Runway's developer platform, separate from its app, with its own keys and credits.”

    • Runway Dev
    • Task
    • Image to video
    • Default
  2. Question 2, locked

    Which of these words means this? “Runway's own flagship video model on the API, 12 credits a second.”

    • Polling
    • Presigned link
    • Sound cue
    • Gen-4.5
  3. Question 3, locked

    Which of these words means this? “A header naming the API version your code was written for, currently 2024-11-06.”

    • Forced length
    • X-Runway-Version
    • Snapshot
    • Retry

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