opchat: Private On-Device AI

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opchat lets you chat with all major AI models in one place — using your own API keys or running models directly on your device. Your API keys stay on your device, encrypted with secure storage. Your conversations are sent directly to the AI provider you choose and never pass through our servers. We don't collect, store, or have access to your chats. No middleman, no subscriptions, no data harvesting.

BRING YOUR OWN KEYS
Connect OpenAI (GPT), Anthropic (Claude), Google (Gemini), DeepSeek, OpenRouter, Straico, Azure, Ollama, or any OpenAI-compatible endpoint. Switch between models mid-conversation or set a default per persona.

ON-DEVICE MODELS
Run AI models directly on your device — completely offline, no API key needed. Browse and download GGUF models from Hugging Face. Your data never leaves your phone. Perfect for privacy-sensitive use or when you're offline.

CUSTOM PERSONAS
Create AI assistants tailored to your needs. Set a system prompt, personality, speaking style, knowledge areas, and conversation starters. Build a research analyst, a coding mentor, a creative writing partner — whatever you need.

BUILT-IN TOOLS
• Web Search — real-time results via Serper or Tavily
• Image Generation & Editing — create and refine images with AI
• Voice — speech-to-text input and text-to-speech output
• Memory — the AI remembers context across your conversations
• MCP Servers — extend with custom tools via Model Context Protocol

ORGANIZE YOUR WORK
Group conversations into projects. Pin important chats. Search across all your history. Export conversations as Markdown or JSON.

FULLY CUSTOMIZABLE
Choose from multiple themes (Claude, GPT, Perplexity, Code) or create your own with custom colors. Pick from 23 fonts. Adjust message density, roundness, and font size.

PRIVATE BY DESIGN
Zero tracking. Zero analytics. Your API keys are encrypted on-device. Conversations go directly to your chosen AI provider — we never see them. Use on-device models or Ollama for fully offline, local AI with no data leaving your phone.

AI-GENERATED CONTENT
All responses are generated by third-party AI models and may be inaccurate or incomplete. Content safety is enforced by each provider's built-in policies. You can report any AI-generated response directly within the app.

Terms of Use: https://opchat.app/terms
Privacy Policy: https://opchat.app/privacy

Nima yangiliklar

Sign in with ChatGPT to use Codex models — gpt-5.5, gpt-5.4 and gpt-5.3-codex with no API key. Refreshed provider picker, smoother onboarding, and bug fixes.