Claude API
What are the current Claude model string identifiers?
QUICK ANSWER
To call Claude models in API requests, use model strings: 'claude-3-5-sonnet-20241022' for Claude 3.5 Sonnet, 'claude-3-5-haiku-20241022' for Claude 3.5 Haiku, and 'claude-3-opus-20240229' for Claude 3 Opus.
Model String Registry
| Model Name | API Model String ID | Primary Use Case |
|---|---|---|
| Claude 3.5 Sonnet | claude-3-5-sonnet-20241022 |
Software engineering, logical reasoning, multi-turn analysis. |
| Claude 3.5 Haiku | claude-3-5-haiku-20241022 |
Ultra-low latency pipelines, high RPM search utilities. |
| Claude 3 Opus | claude-3-opus-20240229 |
Complex strategy mapping, academic research. |
Verified against: Anthropic API Specifications 2026