BAML
Overview
A domain-specific language (DSL) for generating structured outputs from LLMs with high reliability. It features a VS Code playground, full type-safety for multiple languages, and schema-aligned parsing that outperforms standard model defaults.
BAML, from BoundaryML, is a domain-specific language for defining LLM functions that return reliable structured outputs, with a VS Code playground and type-safe clients across languages. Its schema-aligned parsing recovers structure even from imperfect model output. It targets developers who want engineering rigor for prompts.
Key Features
- DSL for structured LLM functions
- Type-safe clients in many languages
- Schema-aligned parsing
- VS Code playground
- Works across models
Best For
Developers who want type-safe, reliable structured outputs across languages and models.
Pros & Cons
Pros
- Robust schema-aligned parsing
- Multi-language type safety
- Good developer tooling
Cons
- Learning a new DSL
- Adds a build step
Pulse Verdict
“The engineering rigor for prompts. BAML turns 'vibes-based' prompting into a structured, type-safe development process that works across any model or language.”
Pricing
Open-source DSL; paid cloud/enterprise features available.
Pricing changes often — confirm current plans on the official site.