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Mutahunter is an open-source, language-agnostic mutation testing tool that leverages large language models (LLMs) to automatically generate and evaluate code mutants. It helps developers assess the quality and robustness of their test suites by introducing small code changes (mutants) and checking whether existing tests can catch them. Mutahunter supports any programming language with a test command (e.g., Maven for Java) and integrates seamlessly into CI/CD pipelines. It provides detailed mutation coverage metrics, including percentage, total mutants, survived, killed, timeouts, and compile errors, along with cost tracking for LLM API usage. The tool is easily installed via pip and requires Python 3.11+.