LLMAPI only
Claude 1
Anthropic
Updated May 21, 2026 · Benchmarks via Artificial Analysis, specs & pricing via OpenRouter · Methodology · Report an error
Superseded by Claude 2
Specifications
- Type
- LLM
- Access
- API only
- Released
- March 14, 2023
- Input
- Text
- Output
- Text
Our take
Anthropic’s first public assistant, trained with Constitutional AI for helpfulness and harmlessness — the start of the Claude line.