# Adding Models & Voices **AI Dev Kit supports over 450 AI models and more than 4,000 voices across multiple providers**, including OpenAI, Google, ElevenLabs, and more. However, you **can’t use them all right away out of the box.** **Why?** Because loading thousands of options by default would: * Overwhelm dropdown menus in the inspector * Slow down the editor interface * Flood code snippets and auto-complete with irrelevant entries * Make your project harder to manage, not easier Instead, AI Dev Kit follows a **"register-as-needed"** approach. You choose and register only the models and voices you plan to use — keeping your project clean, performant, and tailored to your workflow via **Model Library** and **Voice Library**.