AI 视频制作成本大揭秘：从免费到付费的全路径
AI 视频制作要花多少钱？算清三笔账：完全免费在线、本地开源模型、付费平台。附 GPU 硬件账与按量选型表。
How much does AI video cost? From free to $200/month — what's the difference? This article breaks down three cost paths with GPU prices and selection guides.
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Author's note: Cost data from the Agnes Video Generator author's experience and public sources (GPU: gpucost.org, cloud: Spheron/Lambda/RunPod, VRAM: official papers). Prices fluctuate — verify before committing.
1. Completely Free: Agnes Video Generator
Zero upfront, zero marginal. Fill in API Key or use Demo page.
- Ready to use: Text-to-video and image-to-video supported. Ideal for promo shots, poetry, e-commerce.
- Zero hardware: Calls Agnes model API, cloud-based, browser-ready.
- Honest boundaries: ~10s per clip, 1 reference image, no cross-shot consistency — great for materials, not long-form.Details atAI Video Tools Complete Guide。
Agnes is the fastest path to your first AI video. Open Demo now:
Generate your first video free →2. Local Open-Source Models
"Free software, not-free hardware." VRAM and duration references for mainstream models:
| Model | VRAM | Duration | Multi-char | Consistency | Notes |
|---|---|---|---|---|---|
| Wan2.1 | ≥24G | 5–10s | ❌ | ❌ | Chinese-friendly, active community |
| HunyuanVideo 1.5 | ≥24G | 5–10s | ❌ | ❌ | Tencent open-source |
| CogVideoX | 16–24G | 6s | ❌ | ❌ | RTX 4090, supports LoRA |
| LTX-Video | ≥16G | 5s | ❌ | ❌ | Near real-time |
| SkyReels-V2 | ≥24G | Up to 60s | ❌ | ❌ | Longest single segment |
GPU Prices (2026 Market)
| Model | VRAM | Price | Notes |
|---|---|---|---|
| RTX 5090 | 32GB | ~$2,000 | Flagship, all models |
| RTX 4090 | 24GB | ~$1,600 | Sweet spot for video |
| RTX 5070 Ti | 16GB | ~$800 | Entry, pruned models |
| RTX 4070 | 12GB | ~$550 | Tight VRAM, quantized only |
Source: gpucost.org (2026), cloud: Spheron/Lambda/RunPod ($0.34–$2/hr). Prices fluctuate — verify before committing.
RTX 4090 is the minimum for local video models. Under $800 without cloud? Local deployment isn't viable — Agnes Video Generator is the zero-investment choice.
3. Paid Industrial Platforms
Subscription/credit platforms for professionals, offering consistency, duration, and audio-visual sync.
| Platform | Price | Duration | Consistency | Best for |
|---|---|---|---|---|
| Sora 2 | ChatGPT Pro (~$200/mo) | 20s, extendable | Character profiles | Pro teams |
| Kling | Credits (~$10/mo+) | 10s, up to 3min | Subject Library 3.0 | Short drama/IP |
| Seedance | Credits | 4–15s, v2.5 30s | Per-character ref | Short video/ads |
| Runway Gen-4 | ~$15–$95/mo | 5–10s | World Consistency | Multi-platform creators |
For platformalternative comparison, see the dedicated page.
4. Which Path Should You Take?
Scenario A: Zero budget, first try
→ Free API online (Agnes), zero/zero.
Scenario B: 5–10 videos/week, have GPU
→ Local open-source. $800+ upfront, near-zero marginal.
Scenario C: Commercial, brand films, consistency
→ Paid platforms (Kling/Sora). $10–$200/month for quality and consistency.
5. FAQ
Q：How much does AI video cost?
Three tiers: free (Agnes); $800–$2,000 GPU (open-source); $7–$200/month (industrial).
Q：Completely free generators?
Yes. Agnes Video Generator is free online, no GPU needed. Open-source models are free but need your GPU.
Q：Local vs platform — which is cheaper?
High frequency → local (near-zero marginal). Low frequency → free online (Agnes) or subscription (zero hardware).
Q：Does Agnes charge?
Currently free API. Just fill in your Agnes API Key on the Demo page.
Q：How to calculate costs?
Upfront (GPU/subscription) + marginal (per generation). Free = both zero; local = high upfront, low marginal; industrial = low upfront, pay-per-use.
Q：Lowest cost start for beginners?
Open Agnes Demo, fill Key, three steps. Zero investment; upgrade when needed.
Where to go next?
- Haven't chosen a tool? Read part 1AI Video Tools Guide →
- Review part 2 for output type requirements:
- 7 Output Types and Pipelines →
- Start hassle-free:Open Demo to generate your first video →
Data integrity: GPU prices (gpucost.org 2026), cloud (Spheron/Lambda/RunPod 2026), VRAM (official docs) from public sources. Prices fluctuate — verify before committing.
References
This page draws on the following authoritative sources, each with a specific relevance note.
- Artificial Intelligence Index Report 2025Stanford HAI · Stanford AI Index 2025 (2025)
Stanford AI Index 2025 documents a 280x drop in AI inference costs over five years, forming the core data backbone for this page's cost analysis.
- CogVideoX: Text-to-Video Diffusion Models via 3D Causal VAETsinghua University & Zhipu AI · arXiv:2408.06072 (2024)
The CogVideoX paper explicitly states RTX 4090 VRAM requirements, providing a precise hardware baseline for local deployment cost calculations.
- LTX-Video: Realtime Video Latent DiffusionLightricks · arXiv:2501.00103 (2025)
The LTX-Video paper proves 16GB VRAM suffices, offering a lower-cost hardware entry point than RTX 4090 for budget-conscious users.
Por que você pode confiar
Escrito por um desenvolvedor em atividade e verificado com fontes primárias autorizadas, como artigos do arXiv, relatórios técnicos e o Stanford AI Index.
SandGrid@lcy362
Autor do Agnes Video Generator · Desenvolvedor Full-Stack
Desenvolvedor independente e autor do Agnes Video Generator, uma ferramenta de código aberto (MIT) de geração de vídeos IA baseada nos modelos de vídeo gratuitos do Agnes AI. Ajudou mais de 1.000 criadores a produzir vídeos IA sem custo.
Ver no GitHubReferências e fontes
As seguintes pesquisas primárias e relatórios públicos foram consultados para garantir precisão e atualidade.
- Stable Video Diffusion: Scaling Latent Video Diffusion Models to Large Datasets — Stability AI · arXiv:2311.15127 (2023)
- CogVideoX: Text-to-Video Diffusion Models via 3D Causal VAE — Tsinghua University & Zhipu AI · arXiv:2408.06072 (2024)
- HunyuanVideo: A Systematic Framework For Large Video Generative Models — Tencent · arXiv:2412.03603 (2024)
- Wan: Open and Advanced Large Video Models — Alibaba · arXiv:2503.20314 (2025)
- VideoPoet: A Large Language Model for Zero-Shot Video Generation — Google Research · arXiv:2312.14125 (2023)
- LTX-Video: Realtime Video Latent Diffusion — Lightricks · arXiv:2501.00103 (2025)
- SkyReels-V2: Infinite-length Film Generative Model — Kunlun SkyReels Team · arXiv:2504.13074 (2025)
- Artificial Intelligence Index Report 2025 — Stanford HAI · Stanford AI Index 2025 (2025)
- The Economic Potential of Generative AI: The Next Powerhouse of Productivity and Growth? — McKinsey & Company · McKinsey Global Institute (2023)
- Generative AI in Media and Entertainment: A $150 Billion Opportunity — BCG (Boston Consulting Group) · BCG Henderson Institute (2024)
- Digital News Report 2025: AI-Generated Content and Trust in News — Reuters Institute, University of Oxford · Reuters Institute Digital News Report (2025)
- Sora: Video Generation Model Technical Report — OpenAI · OpenAI Technical Report (2024)
- Global AI Video Generation Market Size & Share Analysis (2024-2030) — Grand View Research · Grand View Research Market Report (2024)
Última atualização：2026-07-30
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