# Claude Model Reference

Reference for Claude model identifiers used in TDX.

Source: [https://platform.claude.com/docs/en/about-claude/models/overview](https://platform.claude.com/docs/en/about-claude/models/overview)

## Current Models (Claude 4.5)

| Model | Claude API ID | Claude API Alias |
|  --- | --- | --- |
| Claude Sonnet 4.5 | `claude-sonnet-4-5-20250929` | `claude-sonnet-4-5` |
| Claude Haiku 4.5 | `claude-haiku-4-5-20251001` | `claude-haiku-4-5` |
| Claude Opus 4.5 | `claude-opus-4-5-20251101` | `claude-opus-4-5` |


## Legacy Models

| Model | Claude API ID | Claude API Alias |
|  --- | --- | --- |
| Claude Opus 4.1 | `claude-opus-4-1-20250805` | `claude-opus-4-1` |
| Claude Sonnet 4 | `claude-sonnet-4-20250514` | `claude-sonnet-4-0` |
| Claude Sonnet 3.7 | `claude-3-7-sonnet-20250219` | `claude-3-7-sonnet-latest` |
| Claude Opus 4 | `claude-opus-4-20250514` | `claude-opus-4-0` |
| Claude Haiku 3 | `claude-3-haiku-20240307` | - |


## TDX Default Model

Treasure Studio uses `claude-sonnet-4-5-20250929` as the default model.

## Notes

- Aliases automatically point to the most recent model snapshot
- Use specific model versions (e.g., `claude-sonnet-4-5-20250929`) in production for consistent behavior
- Models with the same snapshot date are identical across all platforms (Anthropic API, AWS Bedrock, GCP Vertex AI)