Using Claude Mythos Preview on Microsoft Foundry
Implementation guide · Claude Mythos · Anthropic
Quick Start
- 1
- 2Use the Microsoft Foundry SDK or REST API to call
claude-mythos-preview— see the documentation for request format.
Code Examples
About Microsoft Foundry
Microsoft Foundry offers a comprehensive platform-as-a-service for enterprise AI operations. It provides multiple deployment options including Serverless APIs (pay-as-you-go), Global Standard (shared managed capacity), Provisioned Throughput Units (reserved capacity), batch processing, and bring-your-own model deployments. The platform features a unified control plane for models, agents, tools, and observability. Its Agent Service enables building and deploying AI agents with built-in tracing, monitoring, and governance. Evaluation and monitoring tools assess model performance, safety, and groundedness. Foundry supports seamless upgrades from Azure OpenAI with non-destructive migration, maintaining existing deployments while unlocking multi-provider model access and advanced platform capabilities.
Microsoft Foundry is a unified Azure platform-as-a-service offering for enterprise AI operations, model builders, and application development. It provides access to over 1,900 models from Microsoft, OpenAI, Anthropic, Mistral, xAI, Meta, DeepSeek, Hugging Face, and more. Foundry unifies agents, models, and tools under a single management grouping with built-in enterprise-readiness capabilities including tracing, monitoring, evaluations, and customizable enterprise setup configurations.
Pricing on Microsoft Foundry
Capabilities
About Claude Mythos Preview
Claude Mythos Preview is Anthropic's frontier research model, positioned above the public Claude 4 family and released exclusively via invitation-only Project Glasswing to roughly 12 launch partners and over 40 organizations working on critical infrastructure. No public API or self-serve access. Specializes in defensive cybersecurity — autonomously identified zero-day vulnerabilities including a 27-year-old OpenBSD TCP SACK remote code execution bug and a 17-year-old FreeBSD NFS RCE. Codenamed Capybara internally. Scores 93.9% on SWE-bench Verified, 82.0% on Terminal-Bench 2.0, and 97.6% on USAMO 2026. Partner pricing: $25/$125 per million tokens (input/output). Max output: 128K tokens. Knowledge cutoff: December 2025.