Runway Gen-4は5秒クリップあたりわずか0.10ドルと、最もリーズナブルなAI動画モデルです。キャラクター一貫性機能により、複数のショットにわたってキャラクターの外見を正確に維持できます。ブランドコンテンツ、短編映画、シリーズ動画に最適です。ターボモードでは10秒のクリップを30〜60秒で生成します。
Runway AI — Gen-4を使ったシネマティックな動画生成ツール
Runway Gen-4 Turboが画像を映画品質の動画に変換。最もコストパフォーマンスの高いAI動画生成ツール。今すぐ無料でお試しください。
Cinematic tracking shot — character in rain-soaked alley
Atmospheric café loop — steam and warm light
Runway Gen-4とは何ですか？
Gen-4 Turboの内側 — 新機能と注目点
- 最大時間
- 10秒
- 解像度
- 1080p
- 生成速度
- 約30〜60秒
- アスペクト比
- 16:9, 9:16, 1:1
- 入力タイプ
- テキスト、画像、画像+テキスト
- キャラクターの一貫性
- あり（複数ショット間）
Runwayのクレジットシステム解説
10 credits for a 5-second video · 20 credits for 10 seconds
At 2 credits/second, Runway Gen-4 is the cheapest AI video model on our platform. A 5-second clip costs ~$0.10 — you can generate 100 videos for about $10. Compare that to Runway's own subscription ($12–76/month with limited generations) and it's a clear win on flexibility.
低コストでキャラクター一貫性を実現 — Runwayが答えか？
When it shines
Runway Gen-4 is the best choice when you need the cheapest per-video cost combined with excellent character consistency. At just 10 credits for a 5-second video, it's the most affordable way to produce AI video at scale. Its character consistency feature is genuinely best-in-class — the same person maintains their exact appearance across multiple shots, making it ideal for brand storytelling, multi-shot ads, and serialized content. The cinematic camera control (dolly, pan, crane) is also among the best.
When to pick a different model
If you need 1080p resolution, Runway's 720p output won't cut it — use Veo, Sora, or Kling instead. If speed is critical, Kling (~30s) and Wan (~20s) generate faster. If visual quality is your top priority regardless of cost, Veo 3.1 produces more photorealistic output. And for complex choreography or dance content, Seedance handles human motion better.
Limitations worth knowing
- 720p resolution (not 1080p). Runway Gen-4 outputs at 720p — lower than the 1080p offered by Veo, Sora, or Kling. For social media content this is usually fine, but for large screens or professional production, the quality difference is visible.
- 5–10 second maximum. Gen-4 clips max out at 10 seconds. For longer content, generate multiple clips and combine them — the character consistency feature helps maintain continuity across cuts.
- No audio generation. Unlike Veo 3.1 which auto-generates sound effects, Runway outputs silent video. You'll need to add audio separately in post-production.
Runway vs Sora vs Veo vs Kling — 機能比較
| 指標 | runway | sora | veo | kling |
|---|---|---|---|---|
| Character Consistency | Yes (cross-shot) | Single-shot only | Single-shot only | Single-shot only |
| Max Duration | 10s | 20s | 8s | 10s |
| Speed | 30-60s | 2-5 min | 2-3 min | 30s |
| Camera Control | Dolly/pan/crane | Prompt-based | Prompt-based | Pan only |
| Resolution | 720p | 1080p | 1080p | 1080p |
| Cost (5s clip) | 10 credits | 30 credits | 30 credits | 10 credits |
| Image Input | Yes | No | Yes | Yes |
Runwayの複数ショット間でキャラクターを一貫させるコツ
1
Describe Camera Movement
Runway Gen-4 excels at camera work. Be specific about camera movement — dolly in, pan left, crane up, tracking shot. It understands cinematography terms.
Slow dolly in on a woman sitting at a cafe, shallow depth of field, golden hour lighting, 35mm film look
2
Use Reference Images
For character consistency, always upload a reference image. Gen-4 will maintain the character's appearance across different scenes and angles.
3
Layer Your Prompts
Structure prompts in layers: subject → action → environment → camera → style. This gives Gen-4 clear priorities for each element.
A chef flipping a pan of vegetables | in a modern restaurant kitchen | medium shot, slight pan right | warm cinematic lighting
よくある質問
他のAI動画モデルを探す
SoraOpenAI
OpenAI's Sora 2 turns your ideas into cinematic video. We give you direct access — skip the waitlist, skip the watermark.
Veo 3Google
Google's Veo 3.1 sets the bar for visual quality in AI video. Film-grade depth of field, natural lighting, auto sound effects. Available here — free to try.
Kling AIKuaishou
Kuaishou's Kling 3.0 generates video in under 30 seconds. When you need output fast — drafts, iterations, social content — Kling gets it done while other models are still processing.