Articles

AI Agent Trends: Open-Source Eval Tooling Is Filling the Gap Before the OpenAI Evals Shutdown

Solo.io launched agentevals on March 25, 2026 and LangChain shipped ReviewBench on July 31, 2026, the same season OpenAI confirmed its hosted Evals platform goes read-only on October 31, 2026 and shuts down November 30, 2026. The combined message for solo operators and small teams is clear: the open-source AI agent evaluation stack has matured to the point where one-person and SMB workflows can replace the hosted tool without losing coverage.