The Vercel AI SDK is an open-source library designed to help developers build conversational, streaming, and chat user interfaces in JavaScript and TypeScript. The SDK supports React/Next.js, Svelte/SvelteKit, with support for Nuxt/Vue coming soon. It includes first-class support for OpenAI, LangChain, and Hugging Face Inference, enabling interoperability across different AI model providers. The SDK provides built-in LLM adapters, streaming first UI helpers, stream helpers and callbacks, and is edge-serverless ready. A new Chat & Prompt Playground has also been launched, allowing developers to compare various language models in real-time, tweak parameters, and quickly generate code. The Vercel AI SDK aims to accelerate product development by enabling developers to focus on creating value with their AI applications rather than spending time building and maintaining infrastructure.