Features
OpenAI-compatible REST API at localhost:8000/v1
Access GPT-4 and GPT-5 models
Streaming responses (token-by-token output)
Multi-turn conversation support with conversation_id
No API key or billing required
Python library with client.chat() method
Docker deployment support
Self-hosted – runs locally, no external dependencies
Supports system messages and chat history
Configurable model selection
Automatic session login and refresh
Works with official openai SDK as drop-in replacement
Cross-platform: Windows, macOS, Linux
Rate limiting configurable via environment variables
Minimal setup: clone, install, sign in, run
Text conversations with GPT-5.5 Instant, Thinking, Pro
Image generation (DALL·E integrated)
Voice conversations with video support
Real-time web browsing (paid plans)
File upload (images, PDFs, spreadsheets, code)
Code interpretation and execution (Codex)
Agent mode (Atlas) for autonomous task completion
Custom instructions and memory
Projects, tasks, and custom GPTs
Group chats and shareable links
Mobile app (iOS, Android)
Desktop app (macOS, Windows)
Square integration for restaurant orders
