43 pages for claude-mythos-5.

model-deprecations Claude Developer Platform · in the page about-claude/model-deprecations …| N/A | Not sooner than September 1, 2027 | | claude-mythos-5-1 | Active | N/A | Not sooner than September 1, 2027 | | claude-fable-5… choosing-a-model Claude Developer Platform · in the page about-claude/models/choosing-a-model …s, with cache reads at a quarter of the cost. **Claude Mythos 5.1** (`claude-mythos-5-1`) offers the same capabilities only to organizations verified through Anthropic's verification programs, such as… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …form.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5) is Anthropic's most capable widely released model, available on the Claude API, [Amazon Bedrock](https://platform… advisor-tool Claude Developer Platform · in the page agents-and-tools/tool-use/advisor-tool …------ | | Claude Haiku 4.5 (claude-haiku-4-5) | Claude Mythos 5.1 (claude-mythos-5-1)<br />Claude Fable 5.1 (claude-fable-5-1)<br />Claude Mythos 5 (claude-mythos-5)<br />Claude Fable 5 (claude-fab… browser-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/browser-use-tool …ention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claude-sonnet-5-5… code-execution-tool Claude Developer Platform · in the page agents-and-tools/tool-use/code-execution-tool …a zdr: not-eligible supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claude-opus-4-8 -… computer-use-tool Claude Developer Platform · in the page agents-and-tools/tool-use/computer-use-tool …ention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claude-sonnet-5-5… Process results programmatically Claude Developer Platform · in the page agents-and-tools/tool-use/programmatic-tool-calling …a zdr: not-eligible supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claude-opus-4-8 -… tool-search-tool Claude Developer Platform · in the page agents-and-tools/tool-use/tool-search-tool …ex_20251119`, `tool_search_tool_bm25_20251119` | | Claude Mythos 5.1 (claude-mythos-5-1) | `tool_search_too… Beta Claude Developer Platform · in the page api/beta …knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through tr… Messages Claude Developer Platform · in the page api/beta/messages …knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through tr… Batches Claude Developer Platform · in the page api/beta/messages/batches …wledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available throug… Create a Message Batch Claude Developer Platform · in the page api/beta/messages/batches/create …wledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available throug… Retrieve Message Batch results Claude Developer Platform · in the page api/beta/messages/batches/results …nowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through… Count tokens in a Message Claude Developer Platform · in the page api/beta/messages/count_tokens …knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through tr… Create a Message Claude Developer Platform · in the page api/beta/messages/create …knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through tr… Completions Claude Developer Platform · in the page api/completions …telligence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access programs… Create a Text Completion Claude Developer Platform · in the page api/completions/create …telligence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access programs… Messages Claude Developer Platform · in the page api/messages …telligence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access programs… Batches Claude Developer Platform · in the page api/messages/batches …igence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access progr… Create a Message Batch Claude Developer Platform · in the page api/messages/batches/create …igence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access progr… Retrieve Message Batch results Claude Developer Platform · in the page api/messages/batches/results …ce for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access p… Count tokens in a Message Claude Developer Platform · in the page api/messages/count_tokens …telligence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access programs… Create a Message Claude Developer Platform · in the page api/messages/create …telligence for coding, knowledge work, and long-running agents - `"claude-mythos-5-1"` Our most capable model for cybersecurity and biology research, available through trusted access programs… claude-in-amazon-bedrock Claude Developer Platform · in the page build-with-claude/claude-in-amazon-bedrock …ility](https://support.claude.com/en/articles/14604842)) | `anthropic.claude-mythos-5-1` | Active (verification required) | | C… claude-in-microsoft-foundry Claude Developer Platform · in the page build-with-claude/claude-in-microsoft-foundry …ility](https://support.claude.com/en/articles/14604842)) | `claude-mythos-5-1` | | ✓ | | Claude Fable 5… claude-on-vertex-ai Claude Developer Platform · in the page build-with-claude/claude-on-vertex-ai …ility](https://support.claude.com/en/articles/14604842)) | `claude-mythos-5-1` | | Claude Fable 5… sent_count = len(messages sent in the compaction request) Claude Developer Platform · in the page build-with-claude/compaction …ata-retention-requirements)) - Supported models: `claude-fable-5-1`, `claude-mythos-5-1`, `claude-fable-5`, `claude-mythos-5`, `claude-mythos-preview`, `claude-opus-5`, `claude-opus-4-8`, `claude-opus… compaction-background Claude Developer Platform · in the page build-with-claude/compaction-background …r: compact-2026-09-04 supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… compaction-keep-recent-turns Claude Developer Platform · in the page build-with-claude/compaction-keep-recent-turns …r: compact-2026-09-04 supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… compaction-on-demand Claude Developer Platform · in the page build-with-claude/compaction-on-demand …r: compact-2026-09-04 supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… compaction-thinking-blocks Claude Developer Platform · in the page build-with-claude/compaction-thinking-blocks …r: compact-2026-09-04 supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… compaction-threshold Claude Developer Platform · in the page build-with-claude/compaction-threshold …ention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… effort Claude Developer Platform · in the page build-with-claude/effort …ention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… structured-outputs Claude Developer Platform · in the page build-with-claude/structured-outputs …ention-requirements). supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-mythos-preview - claude-opus-5-5 - claude-opus-5… task-budgets Claude Developer Platform · in the page build-with-claude/task-budgets …sk-budgets-2026-03-13 supportedModels: - claude-fable-5-1 - claude-mythos-5-1 - claude-fable-5 - claude-mythos-5 - claude-opus-5-5 - claude-opus-5 - claude-opus-4-8 -… API usage primer for Claude Claude Developer Platform · in the page claude_api_primer …-fable-5-1`, adaptive thinking only, always on) * Claude Mythos 5.1 (`claude-mythos-5-1`, adaptive thinking only, always on) * Claude Fable 5 (`claude-fable-5`, adaptive thinking only, always on) * Cl… Or, for Claude Mythos 5.1, which offers the same capabilities to verified organizations: Claude Developer Platform · in the page models/fable-5-1/migration-guide …-fable-5-1). The baseline settings shared by `claude-fable-5-1` and `claude-mythos-5-1`: * **Thinking:** [Adaptive thinking](https://platform.claude.com/docs/en/build-with-claude/thinking) is always… whats-new-fable-5-1 Claude Developer Platform · in the page models/fable-5-1/whats-new-fable-5-1 …| | Claude Mythos 5.1 | claude-mythos-5-1 | Same capabilities as Claude Fable 5.1. Successor to Claude Mythos 5. | Organizations ver… overview Claude Developer Platform · in the page models/mythos-5-1/overview …ber 1, 2026. Claude Fable 5.1 for verified organizations Model ID: `claude-mythos-5-1` Context window: 1M tokens · Max output: 128K tokens · Input pricing: $10 / MTok · Output pricing: $50 / MTok… overview Claude Developer Platform · in the page models/mythos-5/overview …Most capable model for cybersecurity and biology research Model ID: `claude-mythos-5` Context window: 1M tokens · Max output: 128K tokens · Input pricing: $10 / MTok · Output pricing: $50 / MTok [A… overview Claude Developer Platform · in the page release-notes/overview …ding, knowledge work, and research, alongside **Claude Mythos 5.1** (`claude-mythos-5-1`) for Project Glasswing participants. Both models support a [1M token context window](https://platform.claude.co… Scan your codebase for vulnerabilities Claude Code CLI · in the page claude-security …claude.com/docs/en/about-claude/models/introducing-claude-fable-5-and-claude-mythos-5), see the [Claude Security](https://claude.com/product/claude-security) product, available on the Enterprise plan.…