anyai

One API. Any AI provider.

A provider-agnostic AI runtime for Node.js. Switch providers by configuration, not code changes.

Installation

npm install anyai

That's it. You don't need to install individual provider SDKs like @google/generative-ai or openai separately. anyai manages these dependencies internally.

Tree-Shaking Architecture

The package is built with a tree-shakeable architecture. Despite having multiple provider SDKs as optional dependencies, your final application bundle will only include the code for the providers you actually initialize.

If you only use Gemini, the OpenAI and Anthropic logic will be automatically excluded from your production build.

Quick Start

import { AI } from "anyai";

const ai = await AI.create({
  provider: "gemini",
  apiKey: process.env.GEMINI_API_KEY!,
  model: "gemini-2.0-flash", // Fully type-safe, autocompletes Gemini models
});

const response = await ai.chat.send({
  messages: [{ role: "user", content: "Hello!" }],
});

console.log(response.message.content);

Type-Safe Provider Models

When you set the provider, the model field is strictly constrained to that provider's models:

// Valid: only Gemini models are suggested and allowed
await AI.create({
  provider: "gemini",
  model: "gemini-2.0-flash",
  apiKey: "...",
});

// Valid: only OpenAI models are suggested and allowed
await AI.create({
  provider: "openai",
  model: "gpt-4o",
  apiKey: "...",
});

// Error: "gpt-4o" is not a Gemini model
await AI.create({
  provider: "gemini",
  model: "gpt-4o",
  apiKey: "...",
});

Streaming

const stream = ai.chat.stream({
  messages: [{ role: "user", content: "Tell me a story" }],
});

for await (const chunk of stream) {
  if (chunk.type === "delta") {
    process.stdout.write(chunk.delta);
  }
}

Supported Providers

Provider	Status	Capabilities
Gemini	Available	Chat, Streaming
OpenAI	Available	Chat, Streaming
Anthropic	Available	Chat, Streaming

Error Handling

Standardized error types across all providers:

import { AnyAIProviderError, AnyAIConfigError } from "anyai";

try {
  await ai.chat.send({ messages: [{ role: "user", content: "Hello" }] });
} catch (error) {
  if (error instanceof AnyAIProviderError) {
    console.error(`Provider ${error.provider} failed: ${error.message}`);
  }
}

Non-Goals

To keep the core runtime lean and fast, anyai explicitly avoids:

• Adding product-level utility functions or helpers.
• Implicit provider shortcuts like ai.gemini().
• Middleware or plugin systems.
• Multimodal features (images, audio) in the v1 core.