Anthropic · Claude
Claude Haiku 4.5
Activesource:wikidata https://www.wikidata.org/wiki/Q136510159
About this version
Claude Haiku 4.5 is an active, fast‑tier iteration of Anthropic’s Claude family released on 1 October 2025. It retains a knowledge cutoff of February 2025 and expands the context window to roughly 200 000 tokens, offering broader prompt capacity compared with earlier releases in the series.
- API string
- claude-haiku-4-5-20251001
- Context window
- 200K ctx
- Knowledge cutoff
- Feb 1, 2025
- Tier
- Fast
- Released
- Oct 1, 2025
Release & change timeline
1 event- Release
Claude Haiku 4.5 released
Current speed tier; matched Sonnet 4 coding at 1/3 cost and 2x+ speed.
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Part of the Claude version timeline. Catch Me Up — everything that changed across AI & smart home ↗