Use Vercel Ai Sdk if
Solo developers and lean teams
Best default for teams building AI features into web applications with TypeScript.
AI Agent Frameworks
Vercel Ai Sdk vs Llamaindex
Vercel Ai Sdk is the stronger default. Llamaindex is the sharper specialist choice.
Use Llamaindex if
Teams with more specialized requirements
Teams focused on RAG and document-heavy AI applications that need structured data extraction and retrieval pipelines.
Head to head
| Tool | Rag Support | Streaming Ui | Tool Calling | Multi Provider | Typescript First | Abstraction Level | Ecosystem Maturity | Bundle Friendliness | Pick |
|---|---|---|---|---|---|---|---|---|---|
| Vercel Ai Sdk | Medium | High | Medium | Medium | High | Pick | |||
| Llamaindex | High | Medium | High | Medium | Low |
Cost at scale
The pricing picture after the free tier
| Tool | Starter | Growth | Enterprise-ish |
|---|---|---|---|
| Vercel Ai Sdk | $0 | $0 | $0 |
| Llamaindex | $0 | $200 | $400 |
Vercel Ai Sdk
Vercel Ai Sdk is the stronger default. Llamaindex is the sharper specialist choice.
Llamaindex is still credible when its constraints matter more than the default path.