# Guidance vs Vercel AI SDK — Fit & Features

Canonical: https://trutool.co/compare/guidance-vs-vercel-ai-sdk
Author: Snehil (https://trutool.co/authors/snehil)

Compare Guidance and Vercel AI SDK by use case, features, limitations, and evaluation questions.

## Compare fit, features, and limitations

### Guidance
Control language model generation with structured programming patterns.
Best fit: Developers composing agents, structured model outputs, and tool workflows.
- Constrained generation
- Prompt programming
- Model integration
Before you choose: Check licensing, provider compatibility, maintenance, and tool permissions. Test failure recovery before enabling agent actions.
Pricing: https://guidance.readthedocs.io/en/latest/
- [Read Guidance profile](https://trutool.co/tools/guidance): Read Guidance profile

### Vercel AI SDK
A unified TypeScript SDK for building AI apps with modern streaming, fallbacks, and multi-model support—powered by Vercel.
Best fit: People and teams evaluating ai agent frameworks for a specific workflow.
- Core product workflow
Before you choose: Test a representative task, inspect outputs, and confirm integrations, permissions, data handling, licensing, and current costs.
Pricing: https://ai-sdk.dev/
- [Read Vercel AI SDK profile](https://trutool.co/tools/vercel-ai-sdk): Read Vercel AI SDK profile