# clm_537D36619349

subject: OpenAI (/record/openai.md)  
predicate: feature_added  
value: additional_instructions parameter  
valid_from: 2023-12-20  
valid_to: null  
published: 2023-12-20  
recorded: 2026-11-10  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-10  
cite: AsOf. "OpenAI feature added: additional_instructions parameter", as of 2023-12-20. Claim clm_537D36619349, https://asof.is/claim/clm_537D36619349, accessed 2026-11-11. Source: https://developers.openai.com/api/docs/changelog#2023-12-20.  
checked: 2026-11-10 · its source page states the value and the date  

> December, 2023 Dec 20 Update Added additional_instructions parameter to run creation in the Assistants API

What https://developers.openai.com/api/docs/changelog#2023-12-20 says, word for word.

## Sources

- https://developers.openai.com/api/docs/changelog#2023-12-20 (primary, OpenAI, published 2023-12-20)

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.