Anthropic releases Claude Haiku 4.5
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Claude Haiku 4.5 released — a small model at $1/$5 per 1M tokens, 73.3% on SWE-bench Verified (company-reported)
Why it matters
Anthropic said it gives coding performance similar to Sonnet 4, state of the art five months earlier, at one-third the cost and more than twice the speed; released under ASL-2 after testing found only limited CBRN risk
Source — Primary sources first; secondary reports are labelled “Press”
Officialanthropic.comhttps://www.anthropic.com/news/claude-haiku-4-5Added in Week 41, 2026 · See that week
On the map — ⑥ Reasoning Models line
- Previous stopAnthropic releases Claude Opus 4 and Claude Sonnet 4
- This record · stopClaude Haiku 4.5
- Next stopClaude Opus 4.5
In the model family tree — Claude family · 20 versions
- Earlier versionClaude Sonnet 4.5
- This recordClaude Haiku 4.5
- Later versionClaude Opus 4.5