Sidekick LLM is a powerful Chrome extension designed to serve as an AI assistant directly in your side panel. This tool offers a streamlined experience for users looking to interact with AI models without the need to navigate away from their current tasks. With features like instant question-asking by holding CTRL while selecting text, a regular chat mode, and a unique local LLM arena for model comparisons, users can efficiently engage with various AI models like OpenAI, Anthropic, and Gemini.

One of the standout features is the 'Thinking mode', which allows the model to process information and articulate an internal dialogue before providing a response. Users can also customize system prompts for tailored interactions, control model settings such as temperature, and track token usage. The extension requires personal API keys for access to different models, ensuring a versatile and user-friendly experience.