Consult LLM is an MCP server designed to augment Claude Code's capabilities by allowing it to tap into more powerful reasoning models such as OpenAI's o3, Google's Gemini 2.5 Pro, and DeepSeek Reasoner. It intelligently constructs prompts from file contexts, incorporates Git diffs, and provides comprehensive usage tracking with cost estimations, making it an invaluable tool for complex problem-solving and code analysis within the Claude Code environment.