# clm_E11A3877220F

subject: OpenAI (/record/openai.md)  
predicate: customer  
value: Doppel  
valid_from: 2025-10-28  
valid_to: null  
published: 2025-10-28  
recorded: 2026-11-03  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
cite: AsOf. "OpenAI customer: Doppel", as of 2025-10-28. Claim clm_E11A3877220F, https://asof.is/claim/clm_E11A3877220F, accessed 2026-11-09. Source: https://openai.com/index/doppel.  
checked: 2026-11-04 · its source page states the value and the date (its publisher's feed entry for the page)  

> Doppel uses GPT-5 and reinforcement fine-tuning to stop deepfake and impersonation attacks, cutting analyst workloads by 80% and reducing response times from hours to minutes

What https://openai.com/index/doppel says, word for word.

## Sources

- https://openai.com/index/doppel (primary, OpenAI, published 2025-10-28)

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