Microsoft Foundry's February 2026 update brings a wide range of new models, platform features, and SDK changes. Highlights include Claude Opus 4.6 and Sonnet 4.6 with 1M-token context windows, next-gen GPT audio models with improved accuracy, Grok 4.0 reaching GA alongside Grok 4.1 Fast preview, and FLUX.2 Flex for text-heavy image generation. The Microsoft Agent Framework hit release candidate (1.0.0rc1) with significant breaking changes to credentials, sessions, and response patterns. A new Durable Agent Orchestration pattern enables human-in-the-loop workflows using Azure Durable Functions and SignalR. Foundry Local now supports large multimodal models in fully disconnected sovereign environments. The Foundry REST API v1 reached GA, and all language SDKs (Python, .NET, JS/TS, Java) shipped new betas targeting the stable v1 surface with breaking changes. AI Toolkit for VS Code v0.30.0 adds a Tool Catalog, Agent Inspector with F5 debugging, and a redesigned Agent Builder.
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