Vercel AI SDK

Next.js

Next.js is a React meta-framework by Vercel for building full-stack web applications, offering the App Router with React Server Components, hybrid static/SSR rendering, API routes, server actions, and Turbopack-powered builds. It is the most widely adopted React framework for production applications.

Open Source

Frontend Frameworks

5/5

The Vercel AI SDK is the default way to add streaming AI and agents to a Next.js app — both are Vercel projects and integrate seamlessly.

Svelte

Svelte is a compiler-based frontend framework that converts declarative component code into efficient vanilla JavaScript at build time, eliminating the virtual DOM entirely. Svelte 5 introduced runes — a fine-grained reactivity system — alongside SvelteKit as its official full-stack meta-framework.

Open Source

Frontend Frameworks

4/5

The AI SDK's @ai-sdk/svelte package provides Chat and completion classes for streaming AI responses into Svelte and SvelteKit apps.

Vue.js

Progressive JavaScript framework for building user interfaces with an approachable core library and incrementally adoptable ecosystem.

Open Source

Frontend Frameworks

4/5

The AI SDK's @ai-sdk/vue package provides useChat and useCompletion composables for streaming AI responses into Vue and Nuxt apps.

React

React is the most widely used JavaScript library for building user interfaces through reusable components. Created by Meta, it powers web and native apps at massive scale.

Open Source

Frontend Frameworks

4/5

The AI SDK's @ai-sdk/react package provides useChat, useCompletion, and useObject hooks for streaming chat and generative UI in React apps.

Vercel

Vercel is a cloud platform for deploying and scaling frontend applications and serverless functions, with a global Edge Network, automatic CI/CD from Git, and first-class support for Next.js and other modern frameworks.

Freemium

Hosting & Cloud

4/5

The AI SDK routes plain model strings through Vercel AI Gateway, its default provider, while the SDK itself runs on any host; Vercel adds edge runtime support and the Sandbox for agent code.

Claude

Anthropic's family of AI models, from fast Haiku to frontier Fable, available through the Claude API, Amazon Bedrock, Google Vertex AI, Microsoft Foundry, and claude.ai, known for long context, tool use, and adaptive thinking.

Usage Based

LLM

4/5

The Vercel AI SDK provides an official Anthropic provider package for using Claude models.

OpenAI

OpenAI's API platform for the GPT-6 family (Astra, Sol, Luna), plus real-time voice, image generation, transcription, and embeddings, with built-in tools, structured outputs, and agent-building APIs.

Usage Based

LLM

4/5

The Vercel AI SDK provides an official OpenAI provider package for using OpenAI models.

JavaScript

A high-level, dynamic programming language primarily used for web development. Runs natively in browsers and on servers via Node.js, making it the most widely deployed programming language in history.

Open Source

Programming Languages

5/5

The Vercel AI SDK is a TypeScript library for JavaScript and TypeScript apps, running on Node.js, edge runtimes, and in the browser.

Mastra

A TypeScript-native agent framework for building agents, workflows, and RAG pipelines with unified model routing, observational memory, and built-in evals. Apache 2.0 core, YC-backed.

Freemium

Agentic AI

5/5

Mastra is built on the Vercel AI SDK's model layer and adds workflows, memory, and evals on top; the AI SDK alone is the lighter option for streaming and tool calls. Pick the AI SDK for focused features, Mastra for a full agent framework.

LangChain

Open-source Python and JavaScript framework for building LLM-powered agents and applications, with LangGraph for stateful multi-agent orchestration and LangSmith for tracing, evaluation, and deployment.

Open Source

Agentic AI

4/5

The Vercel AI SDK is the dominant TypeScript-native alternative to LangChain for JavaScript teams, favouring a lean provider-agnostic toolkit over LangChain's broader abstraction layer.

Pydantic AI

A type-safe Python agent framework from the team behind Pydantic — applies Pydantic's validation engine to LLM interactions so structured outputs, tool arguments, and dependencies are checked at write time, with native Logfire observability.

Open Source

Agentic AI

3/5

Pydantic AI brings type-validated agents to Python backends; the Vercel AI SDK does the same job for TypeScript apps, with built-in React, Svelte, and Vue streaming hooks. The choice mostly follows the backend language.

LangGraph

A low-level orchestration runtime from LangChain for building stateful, multi-agent applications as graphs — nodes, edges, cyclic execution, and durable state with checkpointing, human-in-the-loop, and time travel. MIT-licensed, Python and JavaScript.

Freemium

Agentic AI

3/5

LangGraph models agents as explicit state graphs with checkpointing, in Python or JavaScript; the Vercel AI SDK keeps agents as a simple tool-calling loop with first-class UI streaming. Pick LangGraph for complex stateful workflows, the AI SDK for chat-style product features.

CrewAI

An open-source Python framework for orchestrating role-playing autonomous AI agents into collaborating teams — MIT-licensed, standalone (no LangChain dependency), with a managed platform for deploying and monitoring agent workflows.

Freemium

Agentic AI

3/5

The Vercel AI SDK is a lean TypeScript toolkit for model calls, streaming, and tool use in web apps; CrewAI is a Python framework built around role-based multi-agent crews. Pick by backend language and whether you need crew orchestration.

OpenAI Agents SDK

OpenAI's open-source framework for building single and multi-agent applications in Python and TypeScript. It provides agents, tools, handoffs, guardrails, sessions, built-in tracing, and sandboxed execution, and works with OpenAI and 100+ other models.

Open Source

Agentic AI

3/5

For TypeScript teams, the OpenAI Agents SDK brings handoffs, guardrails, and tracing for multi-agent backends, while the Vercel AI SDK is stronger at streaming model output into web UIs with React, Vue, and Svelte hooks.