LLM Interface
Unified NPM-based interface for multiple Large Language Model APIs.
Pricing
Free tier
Flat rate
Adoption
→StableLicense
Open Source
Data freshness
Aging · Jun 8, 2026Overview
What is LLM Interface?
A simple and unified npm package that allows developers to interact with various large language model APIs, including OpenAI, AI21 Studio, Anthropic, and more. This tool simplifies the integration of different LLMs into applications by providing a consistent API.
Key differentiator
“LLM Interface stands out as a lightweight, open-source solution that simplifies working with diverse large language models through a single, unified API interface.”
Capability profile
Capability Radar
Honest assessment
Strengths & Weaknesses
↑ Strengths
↓ Weaknesses
API requires Python-specific patterns, TypeScript SDK is community-maintained
v0.1 to v0.2 migration required rewriting chain definitions
Documentation lacks examples and explanations for complex configurations and error handling
The unified API adds latency compared to direct calls to LLM providers
Fit analysis
Who is it for?
✓ Best for
JavaScript/TypeScript developers looking to integrate multiple LLMs into their projects with minimal setup
Teams that need flexibility in choosing between different LLM providers without changing codebase significantly
Projects requiring a consistent API across various AI services
✕ Not a fit for
Developers who only require interaction with one specific LLM provider and prefer direct integration
Scenarios where the overhead of managing multiple LLMs is not justified by the project's requirements
Cost structure
Pricing
Free Tier
Available
Open source — free to use
Starts at
$0
Model
Flat rate
Enterprise
None
Performance benchmarks
How Fast Is It?
Ecosystem
Relationships
Alternatives
Next step
Get Started with LLM Interface
Step-by-step setup guide with code examples and common gotchas.