How to Use NVIDIA ACE in 2026: Step-by-Step Guide
NVIDIA Avatar Cloud Engine (ACE) is NVIDIA's suite of AI technologies for creating digital humans and intelligent NPCs in games. It combines NVIDIA's speech AI, facial animation, and large language models to create real-time responsive characters — including the famous Project DIGITS demo NPC.
NVIDIA Avatar Cloud Engine (ACE) is NVIDIA's answer to the AI character problem: how do you make game NPCs that look, sound, and respond like real people in real time?
ACE is a collection of AI technologies that work together to create complete digital human experiences:
Components of NVIDIA ACE
NVIDIA NIM microservices (the AI brains): LLMs tuned for character dialogue, knowledge grounding, and narrative coherence. Characters stay in-role, remember context, and deliver responses that fit their personality.
NVIDIA Audio2Face: Drives realistic facial animation from audio — lip sync, eye movement, micro-expressions — in real time. A character doesn't just play an animation when it speaks; its entire face responds to the speech AI-generated for that moment.
NVIDIA Riva: Enterprise speech AI for automatic speech recognition and text-to-speech. Players can speak to characters and characters respond in their own voice.
NVIDIA Nemotron LLM: NVIDIA's own language model, fine-tuned for game character use cases, designed to run efficiently on NVIDIA hardware.
The "Journey to Valhalla" Demo
NVIDIA showed ACE in action with a tech demo featuring Jin, an NPC ramen shop owner in a cyberpunk city. Players could have unscripted conversations with Jin — asking about the neighborhood, the menu, the city's factions — and Jin responded naturally, maintained context across the conversation, and reacted with realistic facial animation. It was a landmark demo for the industry.
Integration
ACE integrates with Unreal Engine and Unity. It runs on NVIDIA hardware and via cloud APIs, allowing developers to choose between on-device AI (for low-latency, offline play) and cloud inference (for highest quality).
Current Status
ACE is in early access for game developers. NVIDIA is working with major studios to integrate ACE characters into upcoming titles. It represents the leading edge of what's possible for game AI character technology.
What You'll Need
- A NVIDIA ACE account (starting from Contact for pricing)
- A modern web browser or the NVIDIA ACE app
- Payment method for paid features
Getting Started
Create Your Account
Visit https://www.nvidia.com/en-us/ai-data-science/products/ace/ and sign up for a enterprise account. You'll need an email address to register.
Start Your First Conversation
Once logged in, you'll see the main chat interface. Type a question or task in the input box and press Enter. NVIDIA ACE supports digital-humans, real-time-animation, speech-ai, npc-dialogue, facial-animation, game-character-ai — start with a simple text prompt to get familiar.
Pro Tips
- Be specific: The more context you provide, the better the response. Instead of "write an email," try "write a professional follow-up email to a client who hasn't responded in two weeks."
- Iterate: If you don't get what you need, ask for clarification or refinement: "Make it shorter" or "Use a more formal tone."
- Use examples: Show NVIDIA ACE what format you want by including an example in your prompt.
- Save useful conversations: Most platforms let you name and revisit conversations — organize by project or topic.
Common Use Cases
Gaming
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- Responses seem generic or unhelpful
- Add more context to your prompt. Specify the audience, tone, length, and format you need. Try starting over with a clearer description of your goal.
- The tool isn't responding or is slow
- AI chatbots can experience high traffic. Refresh the page and try again. Check the service's status page if issues persist.
- Output is too long or too short
- Explicitly specify the length: "in 100 words," "as a brief summary," or "in detail with examples."
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Frequently Asked Questions
- Is NVIDIA ACE free to use?
- NVIDIA ACE requires a paid subscription, starting from Contact for pricing.
- Do I need an account to use NVIDIA ACE?
- Yes, you need to create an account to use NVIDIA ACE.
- What can I use NVIDIA ACE for?
- NVIDIA Avatar Cloud Engine (ACE) is NVIDIA's suite of AI technologies for creating digital humans and intelligent NPCs in games. It combines NVIDIA's speech AI, facial animation, and large language models to create real-time responsive characters — including the famous Project DIGITS demo NPC.
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