# clm_CE4AA8254B9B

subject: OpenAI (/record/openai.md)  
predicate: feature_added  
value: custom tool call type  
valid_from: 2025-08-07  
valid_to: null  
published: 2025-08-07  
recorded: 2026-11-01  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-01  
checked: 2026-11-01 · its source page states the value and the date  

> Introduced custom tool call type, which allows for freeform inputs to and outputs from the model when tool calling.

What https://developers.openai.com/api/docs/changelog#2025-08-07 says, word for word.

## Sources

- https://developers.openai.com/api/docs/changelog#2025-08-07 (primary, OpenAI, published 2025-08-07)

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