Claude Model Info

<!-- name: 'Data: Claude model catalog' description: Catalog of current and legacy Claude models with exact model IDs, aliases, context windows, and pricing ccVersion: 2.1.79 --> # 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`, or query the Models API directly (see Programmatic Model Discovery below). ## Programmatic Model Discovery For **live** capability data — context window, max output tokens, feature support (thinking, vision, effort, structured outputs, etc.) — query the Models API instead of relying on the cached tables below. Use this when the user asks "what's the context window for X", "does model X support vision/thinking/effort", "which models support feature Y", or wants to select a model by capability at runtime. ```python m = client.models.retrieve("claude-opus-4-6") m.id # "claude-opus-4-6" m.display_name # "Claude Opus 4.6" m.max_input_tokens # context window (int) m.max_tokens # max output tokens (int) # capabilities is an untyped nested dict — bracket access, check ["supported"] at the leaf caps = m.capabilities caps["image_input"]["supported"] # vision caps["thinking"]["types"]["adaptive"]["supported"] # adaptive thinking caps["effort"]["max"]["supported"] # effort: max (also low/medium/high) caps["structured_outputs"]["supported"] caps["context_management"]["compact_20260112"]["supported"] # filter across all models — iterate the page object directly (auto-paginates); do NOT use .data [m for m in client.models.list() if m.capabilities["thinking"]["types"]["adaptive"]["supported"] and m.max_input_tokens >= 200_000] ``` Top-level fields (`id`, `display_name`, `max_input_tokens`, `max_tokens`) are typed attributes. `capabilities` is a dict — use bracket access, not attribute access. The API returns the full capability tree for every model with `supported: true/false` at each leaf, so bracket chains are safe without `.get()` guards. TypeScript SDK: same method names, also auto-paginates on iteration. ### Raw HTTP ```bash curl https://api.anthropic.com/v1/models/claude-opus-4-6 \ -H "x-api-key: $ANTHROPIC_API_KEY" \ -H "anthropic-version: 2023-06-01" ``` ```json { "id": "claude-opus-4-6", "display_name": "Claude Opus 4.6", "max_input_tokens": 1000000, "max_tokens": 128000, "capabilities": { "image_input": {"supported": true}, "structured_outputs": {"supported": true}, "thinking": {"supported": true, "types": {"enabled": {"supported": true}, "adaptive": {"supported": true}}}, "effort": {"supported": true, "low": {"supported": true}, …, "max": {"supported": true}}, … } } ``` ## 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 | Retires | |-------------------|---------------------|-------------------------------|------------|--------------| | Claude Haiku 3 | — | `claude-3-haiku-20240307` | Deprecated | Apr 19, 2026 | ## 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` |