VS Code 1.133 Enables Model Switching for Claude AI Sessions

Microsoft released Visual Studio Code 1.133 on August 12, 2026, introducing new flexibility for AI-driven development. The update focuses on reducing friction for developers using Claude AI sessions by allowing more granular control over model providers and authentication.

In the new version, users can now switch between Anthropic and Copilot model providers between turns within a single Claude session. According to Visual Studio Code and Visual Studio Magazine, this allows developers to alternate between Anthropic models, which are billed via API key, and Copilot models, which are billed via subscription, without needing to restart their conversation.

Additionally, Microsoft has introduced an experimental setting, `chat.agentHost.allowSignedOutWhenUsable`. This feature allows the Agents window to open without requiring a GitHub sign-in for users who have already configured their own Claude API keys, further decoupling the AI experience from GitHub's mandatory authentication services.

The Shift Toward AI Agnosticism

This update builds upon the foundation laid in version 1.128, which first began integrating multi-chat agent sessions using Anthropic Claude. By allowing users to swap providers on the fly, Microsoft is moving toward a more agnostic AI orchestration layer. This shift enables developers to optimize for both cost and performance, selecting the most capable or cost-effective model for a specific prompt while maintaining the context of a long-running session.

Industry Implications

For the broader development ecosystem, these changes signal a move away from locked-in AI ecosystems. By supporting both subscription-based and API-based billing models in a single interface, VS Code acknowledges that professional workflows often require a hybrid approach to AI tooling. Reducing the reliance on GitHub sign-in for API users also lowers the barrier for developers who prefer independent credential management over centralized platform authentication.

What to Watch

While the provider-switching and sign-in flexibility are now available, the `chat.agentHost.allowSignedOutWhenUsable` feature remains experimental. Developers should monitor future updates to see if this becomes a standard setting and whether Microsoft expands this provider-switching capability to other AI models beyond the Claude and Copilot integration.