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    Which is the best tool to build AI agents?

    Asked "Which is the best tool to build AI agents?", ChatGPT, Copilot, Gemini and Google AI Mode named 20 distinct tools across 5 answers on September 7, 2026, and 6 of them in two or more answers, and all 4 engines agreed on CrewAI, the only tool every engine named.

    Measured acrossChatGPTCopilotGeminiGoogle AI Mode

    6 of 20 names confirmed · named in 2 or more of 5 answers · asked September 7, 2026 · 4 engines

    The best tool to build AI agents depends on your goals, technical background, and specific project needs. LangGraph and LangChain are top choices for developers needing open-source orchestration and custom control, while Microsoft AutoGen + Semantic Kernel and Microsoft Copilot Studio are preferred for enterprise-scale workflows and Microsoft ecosystem integration. CrewAI and other tools like Botpress and n8n are suitable for rapid team-based prototyping, low-code visual building, and workflow automation.

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    The full measurement

    • The position each of the 4 engines gave all 20 names.
    • How many of the 5 answers named each of them.
    • 31 sampled observations behind this ranking, and where the engines disagree.
    • Fan-out — the query each engine actually searched.
    • Every citation, and the sources nobody cited.
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