The TypeScript AI Tech Stack 2025

The complete ecosystem for building production AI applications.

tenxdeveloper.com

Dec 2025 Edition

Decision Tree

Need streaming chat UI?

Y: Vercel AI SDK

N: Raw OpenAI SDK

Complex multi-step agents?

Y: LangGraph

N: Vercel AI SDK

RAG (Document Q&A)?

Y: LlamaIndex.TS

N: Standard Prompting

Production Scale?

Y: Pinecone

N: Supabase pgvector

Start simple. Use the Vercel AI SDK for almost everything. Only reach for LangGraph when you hit the limits of simple loops.

Provider SDKs

OpenAIAnthropicGoogle Vertex

Frameworks

Vercel AI SDKLangGraphMastra

Data Layer

LlamaIndex.TSPinecone / Supabase

Integrations (MCP)

Model Context ProtocolOfficial Servers

Observability

Helicone (Simple)LangSmith (Deep)

Deployment

Vercel AI CloudCloudflare Workers AI

FrameworkVercel AI SDK

AgentsLangGraph

RAGLlamaIndex.TS

Vector DBPinecone

ObservabilityHelicone

DeployVercel

# Install the SDK

npm install ai @ai-sdk/openai

# app/api/chat/route.ts

import { generateText } from 'ai'

import { openai } from '@ai-sdk/openai'

const result = await generateText({

model: openai('gpt-5-mini'),

prompt: 'Hello world!'

})