# clm_3858B7841C77

subject: OpenAI (/record/openai.md)  
predicate: partnership  
value: [Anthropic](/record/anthropic.md)  
valid_from: 2025-08-27  
valid_to: null  
published: 2025-08-27  
recorded: 2026-11-03  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
cite: AsOf. "OpenAI partnership: Anthropic", as of 2025-08-27. Claim clm_3858B7841C77, https://asof.is/claim/clm_3858B7841C77, accessed 2026-11-08. Source: https://openai.com/index/openai-anthropic-safety-evaluation.  
checked: 2026-11-04 · its source page states the value and the date (its publisher's feed entry for the page)  

> OpenAI and Anthropic share findings from a first-of-its-kind joint safety evaluation, testing each other’s models for misalignment, instruction following, hallucinations, jailbreaking, and more—highlighting progress, challenges, and the value of cross-lab collaboration

What https://openai.com/index/openai-anthropic-safety-evaluation says, word for word.

## Sources

- https://openai.com/index/openai-anthropic-safety-evaluation (primary, OpenAI, published 2025-08-27)

---

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