ToolBench provides a platform and command-line interface for creating and running benchmarks that test agentic tools and LLM-powered harnesses. It helps developers systematically evaluate tool-calling capabilities, orchestration logic, and overall agent performance across different models and scenarios. Primarily used by AI researchers and engineers building autonomous agents.
ToolBench is a LLM eval & observability product. It focuses on evaluating and benchmarking the performance of agentic LLM tools and harnesses. ToolBench is an open-source project aimed at AI developers. The project is open source (MIT). The product ships for the command line.
It is developed by Tony Menzo, and the product first shipped in 2026. The project is developed in the open on GitHub with 63 commits in the last 90 days. Among its 4 catalogued features are Benchmark Builder, Agent Evaluation, and LLM Tool Testing.
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