Function calling — the ability of language models to invoke external tools, APIs, and code based on user requests — became the key architectural primitive enabling AI agents. Models that can reliably call web search, execute code, query databases, and take actions with real-world consequences represent a qualitative shift in AI capability.
Function Calling / Tool Use currently drives about 245K/mo in monthly search volume, +467% year over year. Common use cases include AI application development, Agent architecture content, AI integration research.
Related keywords people also research: AI Agents, Reasoning Models, RAG (Retrieval Augmented Generation), AI Coding Assistant, openai api, llm orchestration.
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Tagged: Function calling, Tool use, Agentic AI.