VT Chat

VTChat is a production-ready, privacy-focused AI chat application delivering cutting-edge AI capabilities through a sophisticated dual-tier subscription system. Built with modern web technologies and a privacy-first architecture, VTChat offers advanced AI reasoning, document processing, web search integration, and comprehensive multi-AI provider support.

✨ Key Features:

• Premium AI Models (VT+ exclusive): Claude 4 Sonnet/Opus, GPT-4.1, O3/O3 Mini/O4 Mini, O1 Mini/Preview, Gemini 2.5 Pro, DeepSeek R1, Grok 3
• 9 Free AI Models: Gemini 2.0/2.5 Flash series + OpenRouter models (DeepSeek V3, Qwen3 14B)
• Multi-AI Provider Support: OpenAI, Anthropic, Google, Fireworks, Together AI, and xAI integration
• Document Processing (Free): Upload and analyze PDF, DOC, DOCX, TXT, MD files (up to 10MB) - available to all logged-in users
• Structured Output Extraction (Free): AI-powered JSON data extraction from documents - available to all logged-in users
• Thinking Mode (Free): Complete AI SDK reasoning tokens support with transparent thinking process - available to all logged-in users
• Mathematical Calculator (Free): Advanced functions including trigonometry, logarithms, and arithmetic - available to all users

🔒 Privacy-First Architecture:

• Local-First Storage: All chat data stored in browser's IndexedDB via Dexie.js
• Zero Server Storage: Conversations never leave the user's device
• Multi-User Isolation: Complete data separation on shared devices
• Enterprise-Grade Security: Secure authentication with Better Auth
• Privacy-Focused Security: Bot detection and secure authentication with Better Auth