Using Claude Mythos Preview on Microsoft Foundry

Implementation guide · Claude Mythos · Anthropic

Serverless

Microsoft Foundry exposes Claude Mythos Preview through model ID claude-mythos-preview. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-07-26. Next refresh: weekly.

Quick Start

1
Create an account at Microsoft Foundry and generate an API key.
2
Use the Microsoft Foundry SDK or REST API to call claude-mythos-preview — see the documentation for request format.

API Portal Documentation Pricing

Code Examples

See Microsoft Foundry documentation for integration details.

Pricing on Microsoft Foundry

Capabilities

VisionMultimodalReasoningJSON / Tool useStructured OutputsCode Execution

About Claude Mythos Preview

Anthropic's cybersecurity-focused frontier model, offered as an invitation-only research preview under Project Glasswing. Succeeded by Claude Mythos 5 (API ID: claude-mythos-5) as of June 9, 2026. Anthropic has indicated that Claude Mythos Preview will be retired after Claude Mythos 5 becomes available; no formal retirement date was published as of 2026-06-09. For current access and the migration path, see the Anthropic migration guide.

Full model details →

Model Specs

Released2026-05-01

Context1m

ArchitectureDecoder Only

Knowledge cutoff2025-12

Microsoft

Redmond, Washington, United States