Unverified60% confidenceFactExact time
The tool-calling mechanism was first introduced by OpenAI under the name Function Calling, and was subsequently adopted by mainstream model providers including Anthropic, Google, and Mistral.
2
Sources
60%
Confidence
Long-term
Relevance
7/6/2026
First Seen
Sources
Mouse: A Precision Code Editing Tool Built for AI Programming Agents
hackernewshackernews7/5/2026
Related Claims
UnverifiedOpenAI launched Function Calling in 2023, after which Anthropic's Tool Use, Google DeepMind's ReAct framework, and others successively refined the standard paradigm for model interaction with external systems.83% similarVerifiedAnthropic, Google, and OpenAI have each launched their own Agent frameworks: Claude Computer Use, Gemini Function Calling, and OpenAI Assistants API, respectively.78% similar
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