25 pages for claude-mythos-preview.

model-deprecations Claude Developer Platform · in the page about-claude/model-deprecations …<Note> [Claude Mythos Preview](https://anthropic.com/glasswing) (`claude-mythos-preview`) is deprecated. To migrate to [Claude Mythos 5](https://anthropic.com/glasswing) (`claude-mythos-5`), see t… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page about-claude/models/migration-guide …model-deprecations). #### Update your model name ```python model = "claude-mythos-preview" # Before model = "claude-mythos-5" # After # Or, for the model with the same capabilities and no access… Beta Claude Developer Platform · in the page api/beta …ul intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claud… Messages Claude Developer Platform · in the page api/beta/messages …ul intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claud… Batches Claude Developer Platform · in the page api/beta/messages/batches …ntelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity -… Create a Message Batch Claude Developer Platform · in the page api/beta/messages/batches/create …ntelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity -… Retrieve Message Batch results Claude Developer Platform · in the page api/beta/messages/batches/results …ntelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity -… Count tokens in a Message Claude Developer Platform · in the page api/beta/messages/count_tokens …ul intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claud… Create a Message Claude Developer Platform · in the page api/beta/messages/create …ul intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claud… Completions Claude Developer Platform · in the page api/completions …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… Create a Text Completion Claude Developer Platform · in the page api/completions/create …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… Messages Claude Developer Platform · in the page api/messages …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… Batches Claude Developer Platform · in the page api/messages/batches …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… Create a Message Batch Claude Developer Platform · in the page api/messages/batches/create …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… Retrieve Message Batch results Claude Developer Platform · in the page api/messages/batches/results …rful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-op… Count tokens in a Message Claude Developer Platform · in the page api/messages/count_tokens …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… Create a Message Claude Developer Platform · in the page api/messages/create …Powerful intelligence for long-running agents and coding - `"claude-mythos-preview"` New class of intelligence, strongest in coding and cybersecurity - `"claude-opus-4-6"`… claude-in-amazon-bedrock Claude Developer Platform · in the page build-with-claude/claude-in-amazon-bedrock …| | Claude Mythos Preview | anthropic.claude-mythos-preview | Invitation only ([Project Glasswing](https://anthropic.com/glasswing)) | <Ti… compaction Claude Developer Platform · in the page build-with-claude/compaction …uirements)) - Supported models: `claude-fable-5`, `claude-mythos-5`, `claude-mythos-preview`, `claude-opus-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-opus-4-6`, `claude-sonnet-5`, `claude-sonne… effort Claude Developer Platform · in the page build-with-claude/effort …uirements)) - Supported models: `claude-fable-5`, `claude-mythos-5`, `claude-mythos-preview`, `claude-opus-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-opus-4-6`, `claude-sonnet-5`, `claude-sonne… structured-outputs Claude Developer Platform · in the page build-with-claude/structured-outputs …uirements)) - Supported models: `claude-fable-5`, `claude-mythos-5`, `claude-mythos-preview`, `claude-opus-5`, `claude-opus-4-8`, `claude-opus-4-7`, `claude-opus-4-6`, `claude-sonnet-5`, `claude-sonne… introducing-claude-fable-5-and-claude-mythos-5 Claude Developer Platform · in the page models/fable-5/introducing-claude-fable-5-and-claude-mythos-5 …form.claude.com/docs/en/models/fable-5/migration-guide#migrating-from-claude-mythos-preview). * From Claude Opus 4.8: see [Migrating from Claude Opus 4.8 to Claude Fable 5](https://platform.claude.com… Or, for the model with the same capabilities and no access approval requirement: Claude Developer Platform · in the page models/fable-5/migration-guide …/model-deprecations). ### Update your model name ```python model = "claude-mythos-preview" # Before model = "claude-mythos-5" # After # Or, for the model with the same capabilities and no access… overview Claude Developer Platform · in the page release-notes/overview …form.claude.com/docs/en/models/fable-5/migration-guide#migrating-from-claude-mythos-preview). * On Claude Fable 5 and Claude Mythos 5, `thinking.display` defaults to `"omitted"`, the same as Claude Op… overview Claude Developer Platform · in the page resources/overview …thos Preview System Card" icon="file" href="https://www.anthropic.com/claude-mythos-preview-system-card"> Detailed documentation of Claude Mythos Preview. </Card> <Card title="Claude Sonnet 4…