Verified70% confidenceFactExact time

OpenAI's function calling/tool use mechanism is a hard constraint; the model inference engine directly constrains the valid set of output tokens during the decoding phase, thereby guaranteeing format compliance at the protocol level.

4

Sources

70%

Confidence

Long-term

Relevance

7/16/2026

First Seen

Sources

Introducing LLM Gateways in Production: Five Key Concerns and the Prerequisites for Trust

Related Claims

VerifiedOpenAI推出了Function Calling机制，允许模型以结构化方式声明和调用外部函数83% similar VerifiedOpenAI 的 Function Calling 和 Anthropic 的 Tool Use API 都是 ReAct 模式的标准化实现79% similar VerifiedIn OpenAI's Function Calling, developers declare function names, parameter types, and descriptions in advance, and the LLM autonomously determines when and which function to call during inference, returning a structured call request to the application layer for execution.78% similar

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