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Function Calling
conceptAI Technique
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Overview
Developed byOpenAI
Founded2023
Use caseenabling AI models to execute external functions and tools
Technical
Protocols
JSON SchemaREST API
Knowledge graph stats
Claims53
Avg confidence90%
Avg freshness100%
Last updatedUpdated 4 days ago
Trust distribution
100% unverified
Governance
Not assessed
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Function Calling

concept

Capability allowing language models to invoke external functions and tools during generation.

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primary use case

ValueTrustConfidenceFreshnessSources
enabling AI models to execute external functions and tools○UnverifiedHighFresh1
Enabling AI models to call external functions and APIs during conversation○UnverifiedHighFresh1
Enabling AI models to execute external functions and tools during conversations○UnverifiedHighFresh1
Enabling AI models to execute external functions and APIs during inference○UnverifiedHighFresh1

integrates with

ValueTrustConfidenceFreshnessSources
OpenAI GPT models○UnverifiedHighFresh1
OpenAI API○UnverifiedHighFresh1
Anthropic Claude○UnverifiedHighFresh1
REST APIs○UnverifiedHighFresh1
LangChain framework○UnverifiedModerateFresh1

announced year

ValueTrustConfidenceFreshnessSources
2023○UnverifiedHighFresh1

supports model

ValueTrustConfidenceFreshnessSources
GPT-3.5-turbo○UnverifiedHighFresh1
GPT-4○UnverifiedHighFresh1
Claude 3○UnverifiedModerateFresh1

requires

ValueTrustConfidenceFreshnessSources
structured function definitions○UnverifiedHighFresh1
Function definition in API request○UnverifiedHighFresh1
JSON format function definitions○UnverifiedHighFresh1
JSON schema definition○UnverifiedHighFresh1
JSON schema function definitions○UnverifiedModerateFresh1

enables

ValueTrustConfidenceFreshnessSources
API integration from language models○UnverifiedHighFresh1

use case

ValueTrustConfidenceFreshnessSources
building AI assistants with external tools○UnverifiedHighFresh1

founded year

ValueTrustConfidenceFreshnessSources
2023○UnverifiedHighFresh1

introduced by

ValueTrustConfidenceFreshnessSources
OpenAI○UnverifiedHighFresh1

developed by

ValueTrustConfidenceFreshnessSources
OpenAI○UnverifiedHighFresh1

supports format

ValueTrustConfidenceFreshnessSources
JSON output○UnverifiedHighFresh1

based on

ValueTrustConfidenceFreshnessSources
natural language understanding○UnverifiedHighFresh1
Large Language Model reasoning○UnverifiedModerateFresh1

pricing model

ValueTrustConfidenceFreshnessSources
pay-per-token usage○UnverifiedHighFresh1
Token-based pricing○UnverifiedModerateFresh1
Token-based usage pricing○UnverifiedModerateFresh1

enables capability

ValueTrustConfidenceFreshnessSources
External system integration○UnverifiedHighFresh1
API integrations○UnverifiedHighFresh1
Real-time data retrieval○UnverifiedModerateFresh1

introduced year

ValueTrustConfidenceFreshnessSources
2023○UnverifiedHighFresh1

supports protocol

ValueTrustConfidenceFreshnessSources
JSON Schema○UnverifiedHighFresh1
REST API○UnverifiedModerateFresh1

first introduced year

ValueTrustConfidenceFreshnessSources
2023○UnverifiedHighFresh1

alternative to

ValueTrustConfidenceFreshnessSources
prompt engineering for tool usage○UnverifiedModerateFresh1
Anthropic Claude Tools○UnverifiedModerateFresh1

use case category

ValueTrustConfidenceFreshnessSources
AI Agent Development○UnverifiedModerateFresh1

also supported by

ValueTrustConfidenceFreshnessSources
Claude (Anthropic)○UnverifiedModerateFresh1

competes with

ValueTrustConfidenceFreshnessSources
Google Gemini Function Calling○UnverifiedModerateFresh1

Alternatives & Similar Tools

prompt engineering for tool usage
alternative to
Compare →
Anthropic Claude Tools
alternative to
Compare →
Google Gemini Function Calling
competes with
Compare →

Commonly Used With

OpenAI GPT modelsOpenAI APIAnthropic ClaudeREST APIsLangChain framework

Related entities

Graph Insights

1 entities depend on Function Calling
OpenAI Assistants API
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Claim count: 53Last updated: 4/6/2026Edit history