PromptDeck v1.1.0 is an open‑source desktop studio built with Tauri and React that lets users prompt and benchmark local and cloud LLMs side‑by‑side, supporting up to four models simultaneously (e.g., Ollama, LM Studio, llama.cpp) with optional cloud integrations like OpenRouter, Groq, and DeepSeek. The app runs entirely locally by default, with no telemetry or external calls unless a cloud API key is explicitly added.