Release dates
— Anthropic formally introduced Claude. ↗
Claude 1
Anthropic’s first public Claude model, centered on its Constitutional AI training approach.
MODEL NUMBER006
- First public date
- 2023-03-14
- Organization
- Anthropic
- Family
- Claude
01
Specifications
Only published specifications are shown.
- Input modalities
- Text
- Open weights
- No
- Status
- Legacy
02
Overview
Why it mattered
Claude 1 established a distinct frontier path emphasizing steerability, document work, and natural dialogue.
03
Architecture & capabilities
Model capabilities
ConversationConstitutional AI
04
Release history
Anthropic formally introduced Claude.
View source05
Related models
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06
Sources
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