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02
Examples
Real outputs from the public examples of this model on Replicate, with the prompt and settings that produced them. They were not generated live on this page.
Prompt
A dense, verdant jungle world made up of small lego-like pieces. We see a rainbow chameleon running through the 3D world, the camera in and out of focus.
Längd: 0:08
Settings
aspect_ratio
16:9
duration
10
Prompt
A scene in new york city where all the cars and cabs start floating up. We see a girl watching the scene from the back. indie aesthetic, daytime
Längd: 0:08
Settings
aspect_ratio
16:9
duration
10
Prompt
A scene in new york city where all the cars and cabs start floating up. We see a girl watching the scene from the back
Längd: 0:08
Settings
aspect_ratio
16:9
duration
10
Exempelprompts
Exempel från Railwail-katalogen. De genererades inte live på denna sida.
Cinematic
Längd: 0:10
Woman walking through sunflower field, golden hour
03
Om Runway Gen 4.5
Kort sagtFrån och med 23 september 2026
Runway Gen 4.5 är en modell av Runway i kategorin Videogenerering. På Railwail kostar Runway Gen 4.5 0,144 US$ per videosekund. En standardkörning på 5 sekunder kostar 0,72 US$. Bildförhållanden som stöds: 16:9, 9:16 och 1:1. Möjliga längder: 5 eller 10 s.
Bakgrund
Om Runway
Grundat 2018 · New York City, USA
Runway was founded in 2018 in New York City by Cristobal Valenzuela, Anastasis Germanidis and Alejandro Matamala-Ortiz, three NYU ITP graduates who set out to build AI-native creative tools. Runway co-authored the Stable Diffusion paper (Rombach et al., 2022) with CompVis and LMU Munich and has shipped Gen-1 (2023), Gen-2 (2023), Gen-3 Alpha (June 2024), Gen-3 Alpha Turbo (July 2024), Gen-4 (March 2025) and Gen 4.5 (mid-2025). Gen 4.5 is the incremental update to Gen-4 with higher fidelity, longer durations and improved character consistency. The company has raised over $300M from Google, NVIDIA, Salesforce Ventures and General Catalyst at a $3B+ valuation, and runs the annual AI Film Festival as well as Hollywood-studio partnerships.
Latent video diffusion model (Diffusion Transformer) with reference and motion adapters
Runway Gen 4.5 is a closed Diffusion Transformer operating on a learned spatio-temporal latent space, building on the Gen-4 foundation released in early 2025. The model is conditioned on a multilingual text encoder plus optional image, reference-frame and motion-reference inputs. Gen-4 introduced character-, object- and environment-reference modes that let users lock identity, props or backgrounds across multiple shots; Gen 4.5 expands the reference vocabulary and improves consistency for longer sequences. Native generation is up to 10 seconds per clip at 720p (with 1080p upscale), and Runway's editor chains generations into multi-shot scenes. Gen 4.5 also tightens the integration with Runway's Act-One performance capture, Motion Brush, Lip Sync and Camera Control features. Training uses internal video, licensed footage and partner data on Runway's multimodal training infrastructure.
Parameter
Undisclosed
Funktioner
Text-to-video and image-to-video at up to 720p (1080p via upscale)
10-second clips per generation, chainable into multi-shot scenes
Character-, object- and environment-reference modes for cross-shot consistency
Tight integration with Act-One performance capture, Motion Brush and Lip Sync
Strong cinematic camera-language and Camera Control sliders
Available via Runway web app, mobile app and API
Used in production by Hollywood studios for previs and inserts
Public model card and ongoing safety programme
Best for: film previs, ad creative, multi-shot narratives, character-driven content.
Träning & licens
Curated mix of internal video, licensed footage and partner data on Runway's multimodal training infrastructure; exact corpus size undisclosed.
Licens: Proprietary commercial licence via Runway Terms of Service; generated content usable commercially on paid plans.
Säkerhetstestning: Multi-stage moderation (NSFW, CSAM, celebrity-likeness, trademark); public model card; ongoing red-team programme and policy team.
curl https://railwail.com/api/v1/videos/generations \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "runway-gen45",
"prompt": "A slow drone shot over a misty pine forest at sunrise"
}'
# Response: {"job_id": "...", "status": "queued", ...}
# Poll until status is completed, failed or cancelled:
curl https://railwail.com/api/v1/jobs/JOB_ID \
-H "Authorization: Bearer $RAILWAIL_API_KEY"
import os
import time
import requests
API = "https://railwail.com/api/v1"
headers = {"Authorization": f"Bearer {os.environ['RAILWAIL_API_KEY']}"}
job = requests.post(
f"{API}/videos/generations",
headers=headers,
json={
"model": "runway-gen45",
"prompt": "A slow drone shot over a misty pine forest at sunrise",
},
).json()
while True:
status = requests.get(f"{API}/jobs/{job['job_id']}", headers=headers).json()
if status["status"] in ("completed", "failed", "cancelled"):
break
time.sleep(5)
print(status["status"], status.get("output_url"))
const API = "https://railwail.com/api/v1";
const headers = {
Authorization: `Bearer ${process.env.RAILWAIL_API_KEY}`,
"Content-Type": "application/json",
};
const job = await fetch(`${API}/videos/generations`, {
method: "POST",
headers,
body: JSON.stringify({
model: "runway-gen45",
prompt: "A slow drone shot over a misty pine forest at sunrise"
}),
}).then((r) => r.json());
let status;
do {
await new Promise((r) => setTimeout(r, 5000));
status = await fetch(`${API}/jobs/${job.job_id}`, { headers }).then((r) => r.json());
} while (!["completed", "failed", "cancelled"].includes(status.status));
console.log(status.status, status.output_url);
Runway Gen 4.5 är en modell av Runway i kategorin Videogenerering. På Railwail kan du anropa den med en API-nyckel via Railwail API.
Vad kostar Runway Gen 4.5 på Railwail?
På Railwail kostar Runway Gen 4.5 0,144 US$ per videosekund. En standardkörning på 5 sekunder kostar 0,72 US$. Priset är känt innan körningen startar. Användningen betalas från förbetald kredit; 1 kredit motsvarar 0,01 US$.
Vilka inställningar stöder Runway Gen 4.5?
Enligt sitt inmatningsschema känner Runway Gen 4.5 till dessa parametrar: prompt, duration (5 eller 10), start_image och aspect_ratio (16:9, 9:16 eller 1:1).
Hur snabb är Runway Gen 4.5?
Det finns ännu inte tillräckligt många uppmätta körningar av Runway Gen 4.5 på Railwail för att ange en körningstid. Det beror på inmatningen, inställningarna och belastningen hos leverantören.
Är Runway Gen 4.5 bättre än Google Veo 3.1?
Det beror på uppgiften. Runway Gen 4.5 (Runway) och Google Veo 3.1 (Google DeepMind) är båda modeller i kategorin Videogenerering. Jämförelsesidan visar deras priser och specifikationer sida vid sida.
Skapa en Railwail API-nyckel och skicka din begäran med modell-ID:t runway-gen45. Kodexempel för curl, Python och JavaScript finns i API-avsnittet på denna sida.
