Open Otter

Open Otter — Local AI Workstation for macOS Open Otter transforms your Mac into a powerful AI workstation. Run large language models locally with full Apple Silicon GPU acceleration — your data never leaves your device. LOCAL LLM INFERENCE Run state-of-the-art language models natively on your Mac using the MLX framework. Enjoy fast, streaming text generation with no internet connection required. Support for a wide range of open-source models including Llama, Qwen, Mistral, Gemma, and more. OPENAI-COMPATIBLE API SERVER Open Otter includes a built-in HTTP server that exposes the standard /v1/chat/completions endpoint. Drop it into any workflow that uses the OpenAI API — development tools, scripts, and third-party apps work seamlessly with your local models. DISTRIBUTED INFERENCE CLUSTER Connect multiple Macs on your local network to run larger models that exceed a single machine's memory. Automatic peer discovery via Bonjour, leader election, and intelligent shard placement let you scale inference across devices with zero configuration. REAL-TIME MONITORING A built-in dashboard tracks GPU utilization, memory pressure, power draw, thermal state, and inference metrics (tokens per second, time to first token). Know exactly how your hardware is performing at a glance. MODEL MANAGEMENT Browse and download models from HuggingFace, hf-mirror, and ModelScope directly within the app. Manage your local model library, view model metadata, and switch between models instantly. PERFORMANCE OPTIMIZATION - SSD-backed KV cache persists context across sessions, dramatically speeding up repeated and long conversations - Benchmarking tools to measure and compare model performance on your hardware - Efficient memory management with LRU cache eviction VECTOR DATABASE & DATASETS Built-in vector database and dataset management tools support retrieval-augmented generation (RAG) workflows entirely on-device. Index your documents and enhance model responses with local knowledge — privately. DESIGNED FOR macOS - Native SwiftUI interface with full dark mode support - Menu bar extra for quick access to server controls and resource overview - Runs on macOS 15 and later, optimized for Apple Silicon (M1/M2/M3/M4) PRIVACY BY DESIGN No accounts. No telemetry. No cloud processing. Every computation happens on your hardware. Your conversations, documents, and data remain entirely under your control. Whether you're a developer building AI-powered applications, a researcher experimenting with open models, or anyone who values privacy — Open Otter gives you a complete, self-contained AI environment right on your Mac.