Omni AI Client: A Unified Chat Interface for Large Language Models Supporting Multiple Protocols

Omni AI Client is a modern AI chat client built with Vue 3 and Vite, supporting APIs of various large language models including OpenAI, Anthropic Claude, and Xiaomi MiMo. Through its glassmorphism UI design, automatic protocol detection, and privacy-first architecture, it solves the pain point of switching between multiple models, provides a unified cross-platform interaction experience, and its code is open-source.

In today's era where large language models are flourishing, users face the dilemma of different API formats, authentication methods, and interfaces across models, requiring switching between multiple platforms. Omni AI Client aims to seamlessly connect models using OpenAI/Anthropic protocols through a unified interface and intelligent protocol adaptation. The project uses glassmorphism as its visual language to balance functionality and aesthetics, and it was developed with the assistance of Claude Code and Sonnet 4.5, serving as a case of AI-assisted programming.

1. Multi-provider support: Natively compatible with OpenAI (GPT series), Anthropic Claude (3.5 Sonnet, etc.), Xiaomi MiMo (OpenAI-compatible API), and custom endpoints;
2. Intelligent protocol detection: Automatically determines the endpoint protocol (uses Anthropic protocol if the endpoint contains anthropic.com or /v1/messages; otherwise, uses OpenAI protocol);
3. Quick preset configuration: One-click filling of OpenAI/Claude/MiMo endpoints, only needing to supplement the API key;
4. Theme design: Glassmorphism style, supports light/dark/auto themes, and saves preferences via localStorage.

Frontend stack: Vue3 (Composition API), Vite8, native CSS variables, Plus Jakarta Sans font; Privacy-first: API keys stored locally, browser connects directly to AI providers, no tracking, open-source code; Responsive design: Adapts to desktop/tablet, ensuring usability and aesthetics across different screens.

Local development: Requires Node.js 16+, clone the repository → npm install → npm run dev (access localhost:5173); Production build: npm run build (outputs to dist), npm run preview to preview; Configuration examples: Xiaomi MiMo (endpoint https://platform.xiaomimimo.com/api/v1/chat/completions, model mimo-chat-v2.5), OpenAI (endpoint https://api.openai.com/v1/chat/completions, model gpt-4o, etc.), Anthropic Claude (endpoint https://api.anthropic.com/v1/messages, model claude-3-5-sonnet-20241022).

1. Protocol standardization: OpenAI API has become a de facto standard, promoting an open interoperability ecosystem;
2. Client-first: Pure frontend architecture reduces deployment costs and enhances privacy protection;
3. AI-assisted development: Developed using Claude tools, marking AI-assisted programming as a norm.

Current limitations: Mobile experience needs improvement, no conversation history persistence and search, lack of multimodal support, no plugin ecosystem; Future improvement directions: Optimize mobile experience, add conversation management, support multimodal, build a plugin system.

Omni AI Client is an excellent open-source multi-model chat client that demonstrates modern Web technology and AI-assisted programming practices. For developers, it is a reference implementation; for users, it is a privacy-friendly multi-model entry point. It will play an important role in connecting users with AI capabilities in the future.