# clm_23BC8D21EA03

subject: Anthropic (/record/anthropic.md)  
predicate: model_release  
value: Claude Haiku 5.5  
valid_from: 2026-10-07  
valid_to: null  
published: 2026-10-07  
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  

> October 7, 2026 Claude Haiku 5.5 launch We just launched Claude Haiku 5.5, the cheapest, fastest, and most capable small model we’ve released, designed for high-volume, cost-sensitive tasks.

What https://support.claude.com/en/articles/12138966-release-notes#2026-10-07 says, word for word.

## Sources

- https://platform.claude.com/docs/en/release-notes/overview#2026-10-07 (primary, Anthropic, published 2026-10-07)
- https://support.claude.com/en/articles/12138966-release-notes#2026-10-07 (primary, Anthropic, published 2026-10-07)

---

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