# clm_CCF7949A595E

subject: Google (/record/google.md)  
predicate: model_release  
value: deep-research-preview-04-2026  
valid_from: 2026-04-21  
valid_to: null  
published: 2026-04-21  
recorded: 2026-10-31  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-10-31  
checked: 2026-10-31 · its source page states the value and the date  

> April 21, 2026 Released new versions of the Deep Research agent with collaborative planning, visualization support, MCP server integration, and File Search: deep-research-preview-04-2026 : Designed for speed and efficiency, ideal to be streamed back to a client UI.

What https://ai.google.dev/gemini-api/docs/changelog#2026-04-21 says, word for word.

## Sources

- https://ai.google.dev/gemini-api/docs/changelog#2026-04-21 (primary, Google, published 2026-04-21)

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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.