ModelFusion is a TypeScript library designed to simplify the integration of AI models into JavaScript and TypeScript applications. It offers a unified API for various AI tasks like text generation, image generation, speech synthesis, and transcription, supporting multiple providers and multi-modal inputs. The library aims to facilitate the development of production-ready AI applications, chatbots, and agents with features for observability, logging, and robust error handling.

How It Works

ModelFusion acts as an abstraction layer, providing a vendor-neutral interface to interact with diverse AI models. It supports features like streaming responses, structured object generation with type inference and validation (using Zod), and tool usage for agentic behavior. The library emphasizes production readiness through tree-shakeability, serverless compatibility, and built-in resilience mechanisms like automatic retries and throttling.

Quick Start & Requirements

• Install via npm: npm install modelfusion
• Supports various providers including OpenAI, Llama.cpp, Ollama, Mistral, Cohere, Stability AI, and LMNT.
• API keys for providers can be set via environment variables or passed directly.
• Official documentation and examples are available at modelfusion.dev.

Highlighted Details

• Supports multi-modal inputs, including image processing for vision models.
• Enables structured object generation with Zod schema validation and streaming partial objects.
• Provides tools for building agentic behavior, including runTool and runTools.
• Offers comprehensive logging and observability features with an observer framework.

Maintenance & Community

ModelFusion has joined Vercel and is being integrated into the Vercel AI SDK. The project is community-driven. Further details on contributing can be found in the contributing guide.

Licensing & Compatibility

The library is open-source. Specific license details are not explicitly stated in the README, but it is described as a non-commercial, community-driven project. Compatibility for commercial use or closed-source linking would require checking the specific license file.

Limitations & Caveats

The README indicates that ModelFusion is being integrated into the Vercel AI SDK, suggesting potential shifts in development focus or API. Users should refer to the Vercel AI SDK for the latest features and updates.