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Tool Use timeline: WebGPT, ChatGPT plugins, Function calling, Claude tool use, MCP, Apps in ChatGPT, Advanced tool use, MCP to Linux Foundation

Tool Use

OpenAI and Anthropic · 2021–2025

Dec 2021WebGPT
Mar 2023ChatGPT plugins
Jun 2023Function calling
May 2024Claude tool use
Nov 2024MCP
Oct 2025Apps in ChatGPT
Nov 2025Advanced tool use
Dec 2025MCP to Linux Foundation