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LiteLLM vs Vercel AI SDK

A side-by-side comparison of LiteLLM and Vercel AI SDK, drawn from Ignaite's continuously-verified listings.

Compared from listings verified as of

LiteLLM

Inference

AI gateway: call many LLMs through one OpenAI-format interface.

View LiteLLM

Vercel AI SDK

Orchestration

TypeScript SDK for streaming, tool-calling, and structured outputs.

View Vercel AI SDK

At a glance

Feature comparison of LiteLLM and Vercel AI SDK
AttributeLiteLLMVercel AI SDK
Category (differs)InferenceOrchestration
Pricing (differs)FREEMIUMFREE
License (differs)Open coreOpen source
Deployment (differs)Hybrid—
Platforms (differs)API, Web, CLIAPI
Model support (differs)Multi-modelModel-agnostic
Vendor (differs)BerriAIVercel
Capabilities (differs)
  • LLM gateway / routing
  • Multi-model access
  • Guardrails
  • LLM observability
  • Agent framework
  • Tool / function calling
  • Multi-model access
  • Embeddings

The honest brief

LiteLLM

Translates 100+ providers into one OpenAI-format call — so many other AI tools quietly embed it as their routing layer.

  • Load balancing and guardrails built in
  • Open source SDK + proxy
  • Cost tracking, fallbacks, caching
  • Self-host or managed cloud
  • Proxy adds an extra hop
  • Enterprise features are paid
  • Operational upkeep self-hosted

Vercel AI SDK

The de facto TypeScript AI SDK: provider-agnostic streaming and useChat hooks make swapping LLMs a one-line change.

  • Provider-agnostic, swap models in one line
  • React hooks (useChat) for chat UIs
  • Generative UI / structured outputs
  • Free and open source
  • First-class Next.js integration
  • TypeScript/JS ecosystem only
  • Lighter on agent orchestration
  • Tied to Vercel's release cadence

When to pick which

Both cover Multi-model access.

Pick LiteLLM if you need LLM gateway / routing, Guardrails, and LLM observability.

  • LLM gateway / routing (primary capability)
  • Guardrails (secondary capability)
  • LLM observability (secondary capability)

Pick Vercel AI SDK if you need Agent framework, Tool / function calling, and Embeddings.

  • Agent framework (primary capability)
  • Tool / function calling (primary capability)
  • Embeddings (secondary capability)

LiteLLM leans on Multi-model access as a headline capability; Vercel AI SDK treats it as secondary.

  • Multi-model access (primary capability)

They also differ on:

Pricing
FREEMIUM · FREE
License
Open core · Open source
Platforms
API, Web, CLI · API
LiteLLM detailsVercel AI SDK details