Claude Model Catalog
Only use exact model IDs listed in this file. Never guess or construct model IDs — incorrect IDs will cause API errors. Use aliases wherever available. For the latest information, WebFetch the Models Overview URL in `shared/live-sources.md`.
Current Models (recommended)
| Friendly Name |
Alias (use this) |
Full ID |
Context |
Max Output |
Status |
| Claude Opus 4.6 |
`claude-opus-4-6` |
— |
200K (1M beta) |
128K |
Active |
| Claude Sonnet 4.6 |
`claude-sonnet-4-6` |
- |
200K (1M beta) |
64K |
Active |
| Claude Haiku 4.5 |
`claude-haiku-4-5` |
`claude-haiku-4-5-20251001` |
200K |
64K |
Active |
Model Descriptions
- Claude Opus 4.6 — Our most intelligent model for building agents and coding. Supports adaptive thinking (recommended), 128K max output tokens (requires streaming for large outputs). 1M context window available in beta via `context-1m-2025-08-07` header.
- Claude Sonnet 4.6 — Our best combination of speed and intelligence. Supports adaptive thinking (recommended). 1M context window available in beta via `context-1m-2025-08-07` header. 64K max output tokens.
- Claude Haiku 4.5 — Fastest and most cost-effective model for simple tasks.
Legacy Models (still active)
| Friendly Name |
Alias (use this) |
Full ID |
Status |
| Claude Opus 4.5 |
`claude-opus-4-5` |
`claude-opus-4-5-20251101` |
Active |
| Claude Opus 4.1 |
`claude-opus-4-1` |
`claude-opus-4-1-20250805` |
Active |
| Claude Sonnet 4.5 |
`claude-sonnet-4-5` |
`claude-sonnet-4-5-20250929` |
Active |
| Claude Sonnet 4 |
`claude-sonnet-4-0` |
`claude-sonnet-4-20250514` |
Active |
| Claude Opus 4 |
`claude-opus-4-0` |
`claude-opus-4-20250514` |
Active |
Deprecated Models (retiring soon)
| Friendly Name |
Alias (use this) |
Full ID |
Status |
| Claude Haiku 3 |
— |
`claude-3-haiku-20240307` |
Deprecated |
Retired Models (no longer available)
| Friendly Name |
Full ID |
Retired |
| Claude Sonnet 3.7 |
`claude-3-7-sonnet-20250219` |
Feb 19, 2026 |
| Claude Haiku 3.5 |
`claude-3-5-haiku-20241022` |
Feb 19, 2026 |
| Claude Opus 3 |
`claude-3-opus-20240229` |
Jan 5, 2026 |
| Claude Sonnet 3.5 |
`claude-3-5-sonnet-20241022` |
Oct 28, 2025 |
| Claude Sonnet 3.5 |
`claude-3-5-sonnet-20240620` |
Oct 28, 2025 |
| Claude Sonnet 3 |
`claude-3-sonnet-20240229` |
Jul 21, 2025 |
| Claude 2.1 |
`claude-2.1` |
Jul 21, 2025 |
| Claude 2.0 |
`claude-2.0` |
Jul 21, 2025 |
Resolving User Requests
When a user asks for a model by name, use this table to find the correct model ID:
| User says... |
Use this model ID |
| "opus", "most powerful" |
`claude-opus-4-6` |
| "opus 4.6" |
`claude-opus-4-6` |
| "opus 4.5" |
`claude-opus-4-5` |
| "opus 4.1" |
`claude-opus-4-1` |
| "opus 4", "opus 4.0" |
`claude-opus-4-0` |
| "sonnet", "balanced" |
`claude-sonnet-4-6` |
| "sonnet 4.6" |
`claude-sonnet-4-6` |
| "sonnet 4.5" |
`claude-sonnet-4-5` |
| "sonnet 4", "sonnet 4.0" |
`claude-sonnet-4-0` |
| "sonnet 3.7" |
Retired — suggest `claude-sonnet-4-5` |
| "sonnet 3.5" |
Retired — suggest `claude-sonnet-4-5` |
| "haiku", "fast", "cheap" |
`claude-haiku-4-5` |
| "haiku 4.5" |
`claude-haiku-4-5` |
| "haiku 3.5" |
Retired — suggest `claude-haiku-4-5` |
| "haiku 3" |
Deprecated — suggest `claude-haiku-4-5` |
