# clm_21696F5CA91E

subject: Anthropic (/record/anthropic.md)  
predicate: feature_added  
value: web_search_20260318  
valid_from: 2026-06-11  
valid_to: null  
published: 2026-06-11  
recorded: 2026-11-10  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-10  
cite: AsOf. "Anthropic feature added: web_search_20260318", as of 2026-06-11. Claim clm_21696F5CA91E, https://asof.is/claim/clm_21696F5CA91E, accessed 2026-11-11. Source: https://platform.claude.com/docs/en/release-notes/overview#2026-06-11.  
checked: 2026-11-10 · its source page states the value and the date  

> The web search tool and web fetch tool now support web_search_20260318 and web_fetch_20260318 , adding a response_inclusion parameter to drop consumed result blocks from the API response for agentic workflows.

What https://platform.claude.com/docs/en/release-notes/overview#2026-06-11 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-06-11 (primary, Anthropic, published 2026-06-11)

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