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1# Anthropic models catalogue23**Status:** `DOCUMENTED` for every id below; `LIVE_VERIFIED` for the 11 ids returned by `GET /v1/models` on 2026-09-18 (each also probed with `GET /v1/models/{id}`; 5 of them with a minimal `POST /v1/messages`), `ACCOUNT_RESTRICTED` for the invite-only Mythos ids (404 with our key), `RETIRED` (+ 404 verified) for retired ids. 4**Sources:** models/overview, models/*/overview, about-claude/pricing, about-claude/model-deprecations, about-claude/models/model-ids-and-versions, api/models/list, build-with-claude/{thinking,effort,fast-mode,context-windows,prompt-caching,batch-processing,structured-outputs,vision}, agents-and-tools/tool-use/* (all under https://platform.claude.com/docs/en/), plus `sources/anthropic/models-api-raw.json` and `tmp-live/anthropic-models/summary.json`. 5**Last verified:** 2026-09-18 · Machine-readable twin: `generated/fragments/models/anthropic-models.json` (built by `scripts/gen_anthropic_models_fragment.py`).67## 1. Current lineup (documented, active or deprecated)89| id | Display | Family/gen | Status | Released (docs) | created_at (live) | Cutoff reliable / training | Context | Max out | Thinking | Effort default / levels | Retirement |10|---|---|---|---|---|---|---|---|---|---|---|---|11| `claude-fable-5-1` | Claude Fable 5.1 | Fable 5.1 | DOCUMENTED, LIVE_VERIFIED | 2026-09-01 | 2026-08-28 | Jun 2026 / Jun 2026 | 1,000,000 | 128,000 | adaptive (always on) | high / low,medium,high,xhigh,max | not sooner than 2027-09-01 |12| `claude-mythos-5-1` | Claude Mythos 5.1 | Mythos 5.1 | DOCUMENTED, ACCOUNT_RESTRICTED, PREVIEW | 2026-09-01 | — | Jun 2026 / Jun 2026 | 1,000,000 | 128,000 | adaptive (always on) | high / low,medium,high,xhigh,max | not sooner than 2027-09-01 |13| `claude-fable-5` | Claude Fable 5 | Fable 5 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2026-06-09 | 2026-06-07 | Jan 2026 / Jan 2026 | 1,000,000 | 128,000 | adaptive (always on) | high / low,medium,high,xhigh,max | not sooner than 2027-06-09 |14| `claude-mythos-5` | Claude Mythos 5 | Mythos 5 | DOCUMENTED, ACCOUNT_RESTRICTED, PREVIEW | 2026-06-09 | — | Jan 2026 / Jan 2026 | 1,000,000 | 128,000 | adaptive (always on) | high / low,medium,high,xhigh,max | not sooner than 2027-06-09 |15| `claude-mythos-preview` | Claude Mythos Preview | Mythos preview | DOCUMENTED, ACCOUNT_RESTRICTED, DEPRECATED, PREVIEW | 2026-04-07 | — | ? / ? | 1,000,000 | 128,000 | adaptive | high / low,medium,high,max | to be announced (deprecated 2026-06-09) |16| `claude-opus-5` | Claude Opus 5 | Opus 5 | DOCUMENTED, LIVE_VERIFIED | 2026-07-24 | 2026-07-24 | May 2026 / May 2026 | 1,000,000 | 128,000 (300k batch beta) | adaptive (on by default) | high / low,medium,high,xhigh,max | not sooner than 2027-07-24 |17| `claude-opus-4-8` | Claude Opus 4.8 | Opus 4.8 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2026-05-28 | 2026-05-28 | Jan 2026 / Jan 2026 | 1,000,000 | 128,000 (300k batch beta) | adaptive | high / low,medium,high,xhigh,max | not sooner than 2027-05-28 |18| `claude-opus-4-7` | Claude Opus 4.7 | Opus 4.7 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2026-04-16 | 2026-04-14 | Jan 2026 / Jan 2026 | 1,000,000 | 128,000 (300k batch beta) | adaptive | high / low,medium,high,xhigh,max | not sooner than 2027-04-16 |19| `claude-opus-4-6` | Claude Opus 4.6 | Opus 4.6 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2026-02-05 | 2026-02-04 | May 2025 / Aug 2025 | 1,000,000 | 128,000 (300k batch beta) | adaptive (manual extended deprecated) | high / low,medium,high,max | not sooner than 2027-02-05 |20| `claude-opus-4-5-20251101` | Claude Opus 4.5 | Opus 4.5 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2025-11-24 | 2025-11-24 | May 2025 / Aug 2025 | 200,000 | 64,000 | extended (manual) | high / low,medium,high | not sooner than 2026-11-24 |21| `claude-sonnet-5` | Claude Sonnet 5 | Sonnet 5 | DOCUMENTED, LIVE_VERIFIED | 2026-06-30 | 2026-06-29 | Jan 2026 / Jan 2026 | 1,000,000 | 128,000 (300k batch beta) | adaptive (on by default) | high / low,medium,high,xhigh,max | not sooner than 2027-06-30 |22| `claude-sonnet-4-6` | Claude Sonnet 4.6 | Sonnet 4.6 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2026-02-17 | 2026-02-17 | Aug 2025 / Jan 2026 | 1,000,000 | 128,000 (300k batch beta) | adaptive (manual extended deprecated) | high / low,medium,high,max | not sooner than 2027-02-17 |23| `claude-sonnet-4-5-20250929` | Claude Sonnet 4.5 | Sonnet 4.5 | DOCUMENTED, LIVE_VERIFIED, LEGACY | 2025-09-29 | 2025-09-29 | Jan 2025 / Jul 2025 | 200,000 | 64,000 | extended (manual) | — / — | not sooner than 2026-09-29 |24| `claude-haiku-4-5-20251001` | Claude Haiku 4.5 | Haiku 4.5 | DOCUMENTED, LIVE_VERIFIED | 2025-10-15 | 2025-10-15 | Feb 2025 / Jul 2025 | 200,000 | 64,000 | extended (manual) | — / — | not sooner than 2026-10-15 |2526**Aliases (pre-4.6 only):** `claude-opus-4-5` → `claude-opus-4-5-20251101` (GET /v1/models → 200); `claude-sonnet-4-5` → `claude-sonnet-4-5-20250929` (GET /v1/models → 200); `claude-haiku-4-5` → `claude-haiku-4-5-20251001` (GET /v1/models → 200). Dateless 4.6+ ids are pinned snapshots, not aliases.2728## 2. Live vs docs discrepancies (2026-09-18)2930- `claude-fable-5-1`: live created_at 2026-08-28 != documented release 2026-09-0131- `claude-fable-5`: live created_at 2026-06-07 != documented release 2026-06-0932- `claude-opus-4-7`: live created_at 2026-04-14 != documented release 2026-04-1633- `claude-opus-4-6`: live created_at 2026-02-04 != documented release 2026-02-0534- `claude-sonnet-5`: live created_at 2026-06-29 != documented release 2026-06-3035- `claude-sonnet-4-5-20250929`: live max_input_tokens 1000000 != documented context window 20000036- `claude-haiku-4-5-20251001`: live capabilities.code_execution.supported=false while code-execution-tool docs list claude-haiku-4-5-20251001 as supported (without PTC/REPL persistence)37- `claude-mythos-5-1`, `claude-mythos-5`, `claude-mythos-preview`: documented (invite-only) but `GET /v1/models/{id}` → 404 `not_found_error` with our key and absent from `GET /v1/models` (does not mean non-existent).38- `GET /v1/models` returns undocumented-but-referenced fields `max_input_tokens`, `max_tokens`, `capabilities{batch,citations,code_execution,context_management{clear_tool_uses_20250919,clear_thinking_20251015,compact_20260112},effort{low..max},image_input,pdf_input,structured_outputs,thinking{types{enabled,adaptive}}}` (added 2026-03-18). The reference example shows `max_input_tokens: 0`; live values are real numbers.39- Messages `usage` (live) contains `cache_creation{ephemeral_5m_input_tokens,ephemeral_1h_input_tokens}`, `output_tokens_details.thinking_tokens` (absent on Sonnet 4.6), `service_tier: "standard"`, `inference_geo: "global"`; top level `container: null`, `stop_details: null`. No `speed` field unless fast mode is requested.4041## 3. Model × Capability matrix4243| Capability | Fable 5.1 | Mythos 5.1 | Fable 5 | Mythos 5 | Mythos Preview | Opus 5 | Opus 4.8 | Opus 4.7 | Opus 4.6 | Opus 4.5 | Sonnet 5 | Sonnet 4.6 | Sonnet 4.5 | Haiku 4.5 |44|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|45| vision | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |46| high_resolution_vision_2576px | yes | yes | yes | yes | yes | yes | yes | yes | no | no | yes | no | no | no |47| pdf_input | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |48| thinking_extended_manual_budget | no | no | no | no | no | no | no | no | yes | yes | no | yes | yes | yes |49| thinking_adaptive | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |50| thinking_always_on | yes | yes | yes | yes | no | no | no | no | no | no | no | no | no | no |51| interleaved_thinking | yes | yes | yes | yes | yes | yes | yes | yes | yes | beta header interleaved-thinking-2025-05-14 with manual thinking | yes | yes | beta header interleaved-thinking-2025-05-14 with manual thinking | no |52| effort_parameter | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | no |53| fast_mode_speed_fast | no | no | no | no | no | yes | yes | no | no | no | no | no | no | no |54| structured_outputs_json | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |55| fine_grained_tool_streaming | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |56| prompt_caching_1h_ttl | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |57| min_cacheable_tokens | 512 | 512 | 512 | 512 | 2048 | 512 | 1024 | 2048 | 4096 | 4096 | 1024 | 1024 | 1024 | 4096 |58| batch_api | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |59| batch_extended_output_300k_beta | no | no | no | no | no | yes | yes | yes | yes | no | yes | yes | no | no |60| citations | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |61| code_execution | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | no |62| programmatic_tool_calling | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | no |63| computer_use | yes | yes | yes | yes | no | yes | yes | yes | yes | yes | yes | yes | yes | yes |64| browser_use | yes | yes | yes | yes | no | yes | yes | no | no | no | yes | no | no | no |65| tool_search | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |66| advisor_tool | yes | yes | yes | yes | no | yes | yes | yes | yes | yes | yes | yes | yes | yes |67| compaction_server_side | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |68| context_1m_default_no_beta | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |69| inference_geo_data_residency | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |70| mid_conversation_system_messages | yes | yes | yes | yes | no | yes | yes | no | no | no | no | no | no | no |71| task_budgets_beta | yes | yes | yes | yes | no | yes | yes | yes | no | no | no | no | no | no |72| tool_choice_any_or_tool | no | no | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |73| priority_tier | no | no | yes | no | no | no | yes | yes | yes | yes | no | yes | yes | yes |74| zero_data_retention_eligible | no | no | no | no | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |75| latency_class | Slower | Slower | ? | ? | ? | Moderate | ? | ? | ? | ? | Fast | ? | ? | Fastest |7677`code_execution` row = live `capabilities.code_execution.supported`; docs list Haiku 4.5 as supported (without programmatic tool calling / REPL persistence). 78`sampling params`: temperature/top_p/top_k non-default → 400 on Claude 4.7+ and Mythos Preview; incompatible with thinking on older models.7980## 4. Model × Tool-version matrix (exact `type` strings)8182| tool `type` | beta header | Fable 5.1 | Mythos 5.1 | Fable 5 | Mythos 5 | Mythos Preview | Opus 5 | Opus 4.8 | Opus 4.7 | Opus 4.6 | Opus 4.5 | Sonnet 5 | Sonnet 4.6 | Sonnet 4.5 | Haiku 4.5 |83|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|84| `web_search_20260318` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |85| `web_search_20260209` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |86| `web_search_20250305` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |87| `web_fetch_20260318` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |88| `web_fetch_20260309` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |89| `web_fetch_20260209` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | no | yes | yes | no | no |90| `web_fetch_20250910` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |91| `code_execution_20260521` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |92| `code_execution_20260120` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |93| `code_execution_20250825` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |94| `tool_search_tool_regex_20251119` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |95| `tool_search_tool_bm25_20251119` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |96| `advisor_20260301` | advisor-tool-2026-03-01 | yes | yes | yes | yes | no | yes | yes | yes | yes | yes | yes | yes | yes | yes |97| `mcp_toolset` | mcp-client-2025-11-20 | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |98| `memory_20250818` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |99| `bash_20250124` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |100| `text_editor_20250728` | — | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes | yes |101| `computer_toolset_20260801` | — | yes | yes | yes | yes | no | yes | yes | no | no | no | yes | no | no | no |102| `browser_toolset_20260801` | — | yes | yes | yes | yes | no | yes | yes | no | no | no | yes | no | no | no |103| `computer_20251124` | computer-use-2025-11-24 | yes | yes | yes | yes | no | yes | yes | yes | yes | yes | yes | yes | no | no |104| `computer_20250124` | computer-use-2025-01-24 | no | no | no | no | no | no | no | no | no | no | no | no | yes | yes |105106Legacy tool versions: `computer_20250124` (beta `computer-use-2025-01-24`) for Sonnet 4.5, Haiku 4.5, Opus 4.1, Sonnet 4, Opus 4; `computer_20241022`/`bash_20241022`/`text_editor_20241022` (beta `computer-use-2024-10-22`) only for Sonnet 3.5 (Oct 2024, retired); `text_editor_20250124` for Sonnet 3.7 (retired); `text_editor_20250429` Claude 4.x (superseded by `text_editor_20250728`); `code_execution_20250522` Python-only (legacy); `mcp-client-2025-04-04` deprecated. Undated aliases `tool_search_tool_regex` / `tool_search_tool_bm25` resolve to the latest dated version. Advisor tool: executor→advisor pairs are constrained (advisor must be at least as capable; see advisor-tool page).107108## 5. Model × Endpoint matrix109110| Endpoint | Applies to |111|---|---|112| `POST /v1/messages` | all active models (all 11 live ids verified 200 with `GET /v1/models/{id}`; 5 verified with a real message) |113| `POST /v1/messages/count_tokens` | all active models (verified on opus-5, sonnet-5, fable-5-1, opus-4-8, sonnet-4-6) |114| `POST /v1/messages/batches` | all active models; `output-300k-2026-03-24` on Opus 5/4.8/4.7/4.6, Sonnet 5/4.6 |115| `GET /v1/models`, `GET /v1/models/{id}` | lists 11 ids; aliases resolve; retired → 404 `not_found_error`; invite-only Mythos → 404 |116| `/v1/files` (GA 2026-08-19) | model-agnostic; files referenced from Messages / code execution |117| `/v1/skills` (GA 2026-08-19) | any model supporting code execution |118| Managed Agents `/v1/agents`, `/v1/sessions`, `/v1/environments` (beta `managed-agents-2026-04-01`) | model set documented per feature (Dreams: Fable 5, Sonnet 5, Opus 5) |119| `POST /v1/complete` (Text Completions) | legacy; removed from Python SDK v1.0 (2026-08-20) |120121## 6. Model × Cloud matrix122123| id | Amazon Bedrock | Google Cloud (Vertex) | Microsoft Foundry | Claude Platform on AWS |124|---|---|---|---|---|125| `claude-fable-5-1` | `anthropic.claude-fable-5-1` | `claude-fable-5-1` | `claude-fable-5-1` | `claude-fable-5-1` |126| `claude-mythos-5-1` | `anthropic.claude-mythos-5-1` | `claude-mythos-5-1` | `claude-mythos-5-1` | — |127| `claude-fable-5` | `anthropic.claude-fable-5` | `claude-fable-5` | `claude-fable-5` | `claude-fable-5` |128| `claude-mythos-5` | `anthropic.claude-mythos-5` | `claude-mythos-5` | `claude-mythos-5` | — |129| `claude-mythos-preview` | `anthropic.claude-mythos-preview` | — | — | — |130| `claude-opus-5` | `anthropic.claude-opus-5` | `claude-opus-5` | `claude-opus-5` | `claude-opus-5` |131| `claude-opus-4-8` | `anthropic.claude-opus-4-8` | `claude-opus-4-8` | `claude-opus-4-8` | `claude-opus-4-8` |132| `claude-opus-4-7` | `anthropic.claude-opus-4-7` | `claude-opus-4-7` | `claude-opus-4-7` | `claude-opus-4-7` |133| `claude-opus-4-6` | `anthropic.claude-opus-4-6-v1` | `claude-opus-4-6` | `claude-opus-4-6` | `claude-opus-4-6` |134| `claude-opus-4-5-20251101` | `anthropic.claude-opus-4-5-20251101-v1:0` | `claude-opus-4-5@20251101` | `claude-opus-4-5` | `claude-opus-4-5` |135| `claude-sonnet-5` | `anthropic.claude-sonnet-5` | `claude-sonnet-5` | `claude-sonnet-5` | `claude-sonnet-5` |136| `claude-sonnet-4-6` | `anthropic.claude-sonnet-4-6` | `claude-sonnet-4-6` | `claude-sonnet-4-6` | `claude-sonnet-4-6` |137| `claude-sonnet-4-5-20250929` | `anthropic.claude-sonnet-4-5-20250929-v1:0` | `claude-sonnet-4-5@20250929` | `claude-sonnet-4-5` | `claude-sonnet-4-5` |138| `claude-haiku-4-5-20251001` | `anthropic.claude-haiku-4-5`, `anthropic.claude-haiku-4-5-20251001-v1:0` | `claude-haiku-4-5@20251001` | `claude-haiku-4-5` | `claude-haiku-4-5` |139140Bedrock: Opus 4.7+ and Haiku 4.5 use the Messages-API endpoint ids (`anthropic.claude-…`, no `-v1:0`); Opus 4.6 is the last `-v1` id (`anthropic.claude-opus-4-6-v1`); dated models use `anthropic.claude-{name}-{YYYYMMDD}-v1:0` via InvokeModel. Vertex: dated models use `@YYYYMMDD`. Foundry and Claude Platform on AWS use the Claude API id (alias form where one exists). Partner clouds set their own retirement dates and +10% regional-endpoint pricing.141142## 7. Retired models (deprecations page + release notes)143144| id | Display | Deprecated | Retired | Replacement | Our probe | Cloud note |145|---|---|---|---|---|---|---|146| `claude-opus-4-1-20250805` | Claude Opus 4.1 | 2026-06-05 | 2026-08-05 | `claude-opus-4-8` | 404 | retired on Claude API; still listed (deprecated) on Bedrock and Google Cloud |147| `claude-opus-4-20250514` | Claude Opus 4 | 2026-04-14 | 2026-06-15 | `claude-opus-4-8` | — | retired on Claude API and Bedrock; still listed (deprecated) on Google Cloud |148| `claude-sonnet-4-20250514` | Claude Sonnet 4 | 2026-04-14 | 2026-06-15 | `claude-sonnet-4-6` | 404 | retired on Claude API; still listed (deprecated) on Bedrock and Google Cloud; 1M context beta retired 2026-04-30 |149| `claude-3-7-sonnet-20250219` | Claude Sonnet 3.7 | 2025-10-28 | 2026-02-19 | `claude-sonnet-4-6` | 404 | retired everywhere per Bedrock table |150| `claude-3-5-haiku-20241022` | Claude Haiku 3.5 | 2025-12-19 | 2026-02-19 | `claude-haiku-4-5-20251001` | 404 | retired on Claude API; still listed (deprecated) on Bedrock and Google Cloud; counts cache reads toward ITPM |151| `claude-3-haiku-20240307` | Claude Haiku 3 | 2026-02-19 | 2026-04-20 | `claude-haiku-4-5-20251001` | 404 | |152| `claude-3-5-sonnet-20241022` | Claude Sonnet 3.5 (Oct 2024) | 2025-08-13 | 2025-10-28 | `claude-sonnet-4-6` | 404 | |153| `claude-3-5-sonnet-20240620` | Claude Sonnet 3.5 (Jun 2024) | 2025-08-13 | 2025-10-28 | `claude-sonnet-4-6` | — | |154| `claude-3-opus-20240229` | Claude Opus 3 | 2025-06-30 | 2026-01-05 | `claude-opus-4-8` | 404 | researchers may request access via External Researcher Access Program |155| `claude-3-sonnet-20240229` | Claude Sonnet 3 | 2025-01-21 | 2025-07-21 | `claude-sonnet-4-6` | — | |156| `claude-2.1` | Claude 2.1 | 2025-01-21 | 2025-07-21 | `claude-opus-4-8` | — | |157| `claude-2.0` | Claude 2.0 | 2025-01-21 | 2025-07-21 | `claude-opus-4-8` | — | |158| `claude-1.0` | claude-1.0 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |159| `claude-1.1` | claude-1.1 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |160| `claude-1.2` | claude-1.2 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |161| `claude-1.3` | claude-1.3 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |162| `claude-instant-1.0` | claude-instant-1.0 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |163| `claude-instant-1.1` | claude-instant-1.1 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |164| `claude-instant-1.2` | claude-instant-1.2 | 2024-09-04 | 2024-11-06 | `claude-haiku-4-5-20251001` | — | |165166## 8. Pricing snapshot (USD per MTok; full detail in docs/anthropic/pricing.md)167168| id | input | output | 5m write | 1h write | cache read | batch in/out | fast in/out |169|---|---|---|---|---|---|---|---|170| `claude-fable-5-1` | 10 | 50 | 12.5 | 20 | 0.25 | 5.0 / 25.0 | — |171| `claude-mythos-5-1` | 10 | 50 | 12.5 | 20 | 0.25 | 5.0 / 25.0 | — |172| `claude-fable-5` | 10 | 50 | 12.5 | 20 | 1.0 | 5.0 / 25.0 | — |173| `claude-mythos-5` | 10 | 50 | 12.5 | 20 | 1.0 | 5.0 / 25.0 | — |174| `claude-mythos-preview` | not listed | | | | | | |175| `claude-opus-5` | 5 | 25 | 6.25 | 10 | 0.5 | 2.5 / 12.5 | 10 / 50 |176| `claude-opus-4-8` | 5 | 25 | 6.25 | 10 | 0.5 | 2.5 / 12.5 | 10 / 50 |177| `claude-opus-4-7` | 5 | 25 | 6.25 | 10 | 0.5 | 2.5 / 12.5 | — |178| `claude-opus-4-6` | 5 | 25 | 6.25 | 10 | 0.5 | 2.5 / 12.5 | — |179| `claude-opus-4-5-20251101` | 5 | 25 | 6.25 | 10 | 0.5 | 2.5 / 12.5 | — |180| `claude-sonnet-5` | 2 | 10 | 2.5 | 4 | 0.2 | 1.0 / 5.0 | — |181| `claude-sonnet-4-6` | 3 | 15 | 3.75 | 6 | 0.3 | 1.5 / 7.5 | — |182| `claude-sonnet-4-5-20250929` | 3 | 15 | 3.75 | 6 | 0.3 | 1.5 / 7.5 | — |183| `claude-haiku-4-5-20251001` | 1 | 5 | 1.25 | 2 | 0.1 | 0.5 / 2.5 | — |184185## 9. Notes186187- Model IDs: 4.6+ ids are dateless pinned snapshots (`claude-{name}-{major}[-{minor}]`); pre-4.6 ids carry `-YYYYMMDD` and have convenience aliases. Weights never change under an id; serving infrastructure may.188- Tokenizer: Claude 4.7+ and Mythos Preview use a new tokenizer (~30% more tokens for the same text); 1M tokens ≈ 555k words on it vs ≈ 750k words before.189- Thinking: adaptive is the only mode on Fable/Mythos 5.x (cannot be disabled; no budgets; no prefill); Opus 5 / Sonnet 5 have thinking on by default and reject `type: enabled`; Opus 4.6 / Sonnet 4.6 accept `enabled` but it is deprecated; 4.5 models are manual-budget only.190- Fast mode: only Opus 5 and Opus 4.8 (`speed: "fast"` + `fast-mode-2026-02-01`); Opus 4.7 → error since 2026-07-24; Opus 4.6 → silently standard since 2026-06-29.191- Rate-limit buckets: Fable 5.x shared; Mythos 5.x shared; Opus 5 own; Opus 4.8/4.7/4.6/4.5 shared; Sonnet 5 own; Sonnet 4.6/4.5 shared; Haiku 4.5 own.192- Data retention: Fable 5/5.1 and Mythos 5/5.1 require 30-day retention (no ZDR unless authorized).193- Watermarking: text from Fable 5.1 / Mythos 5.1 carries Anthropic's text watermark; code-execution media files carry C2PA credentials via the Files API.194