# clm_2EEA96FD81A8

subject: OpenRouter (/record/openrouter.md)  
predicate: feature_added  
value: Reasoning stream summaries  
valid_from: 2025-05-28  
valid_to: null  
published: 2025-05-28  
recorded: 2026-10-30  
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  

> OpenAI’s o3 and o4-mini models now support streaming reasoning summaries via the OpenRouter Chat Completions API.

What https://openrouter.ai/blog/announcements/new-features-reasoning-streams-crypto-invoices-end-user-ids-and-more/ says, word for word.

## Sources

- https://openrouter.ai/blog/announcements/new-features-reasoning-streams-crypto-invoices-end-user-ids-and-more/ (primary, OpenRouter, published 2025-05-28)

---

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