What does each major video model cost per second through one multi-vendor API (Runway Dev, Oct 2026), and how does Seedance 2.5 draft mode work in API terms?

Runway Dev docs (captured 2026-10-23): credits cost $0.01; the API serves Runway and third-party models (Seedance 2.5/2.0/Fast/Mini, Aleph 2.0, Gen-4.5, Gen-4 Turbo, Act-Two, Kling 3.0/O3 incl. 4K, Kling 2.5 Turbo, MiniMax H3 (hailuo3) and H3 Max, Wan 3.0/Prime, Grok Imagine 1.5/Lite, HappyHorse 1.0, Veo 3.1/Fast, Gemini Omni Flash/1.1; images: GPT Image 2.5 Sunburst/Flare, GPT Image 2, Nano Banana 2.1/2/2 Lite/Pro, Ideogram 4.5/4.0, Seedream 5.0, Grok Imagine Image 2, Meta Muse Image, Bria FIBO; upscalers) plus "Model Routers" that pick models by cost/latency/quality. Per-second prices (output): Seedance 2.5 480p 20 cr ($0.20), 720p 30 ($0.30), 1080p 68 ($0.68 = $40.80/min) plus input/reference video 10/15/34 cr/s (combined input video capped at 30 s; reference images and audio free; 80-credit minimum); Seedance 2.0 36-40 cr/s (4K 150); Kling 3.0 Pro 12 (17 with audio), 3.0 4K 43; Kling O3 Pro 17; Kling 2.5 Turbo Pro 12; MiniMax H3 768p 10 (+2 per reference image/keyframe), 2K 15; H3 Max 480p 5 / 768p 8; Wan 3.0 5/10/20 (480/720/1080p), Wan 3.0 Prime 6.8/14/28; Veo 3.1 40 with audio / 20 without, Veo 3.1 Fast 15/10; Gemini Omni Flash 1.1 3.4/10/15/30 (360p/720p/1080p/4K) + 1 per reference image + 1 per second of input video; Grok Imagine 1.5 10/16/29, Lite 2/3/14; HappyHorse 1.0 15/30; Gen-4.5 12; Gen-4 Turbo 5; Aleph 2.0 28 (56 minimum); Act-Two 5. Seedance 2.5 draft mode in API: set draft:true for a 480p preview billed at 480p, then call text_to_video with draftTaskId within 7 days to enhance to 1080p at the 1080p rate. Kling 4.0 is not in this catalogue yet. Comparison: Seedance 2.5 1080p via Runway ($40.80/min) is above AA's listed $34.12/min creator-API price (C3-B369-01), showing host markups/differences. Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources. Provider documentation as served 2026-10-23; models, limits and prices change without notice. Limitations: Prices change often; resolution tiers for some models not listed; enhancement cost not separately itemized beyond "1080p rate". Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

{
  "citations": [
    {
      "url": "https://docs.dev.runwayml.com/guides/pricing.md",
      "note": "line 6-7; seedance2_5 (1080p) row; Seedance 2.5 draft mode; veo3.1 rows"
    },
    {
      "url": "https://docs.dev.runwayml.com/guides/models.md",
      "note": "line 6-7; seedance2_5 (1080p) row; Seedance 2.5 draft mode; veo3.1 rows"
    }
  ]
}