OpenAI GPT-4.5 in GitHub Copilot now available in public preview

GitHub Copilot GPT-4.5

OpenAI’s latest model, GPT-4.5, is now available in GitHub Copilot Chat to Copilot Enterprise users. GPT-4.5 is a large language model designed with advanced capabilities in intuition, writing style, and broad knowledge. It performs effectively with creative prompts and provides reliable responses to obscure knowledge queries. GPT-4.5 will launch in Visual Studio Code and on github.com for Copilot Enterprise users with a limit of 10 requests every 12 hours per user. In the coming weeks, we’ll be scaling rate limits and extending support to Visual Studio and JetBrains.

GPT 4.5 in the VS Code Model Picker

As model releases have continued to accelerate, we’ve been thinking about how we can sustainably offer advanced AI models like GPT-4.5 to more GitHub users. This includes individual developers who want the most advanced capabilities from day one. Stay tuned for updates.

Enabling access

Copilot Enterprise administrators will need to enable access to GPT-4.5 via a new policy in Copilot settings. As an administrator, you can confirm availability by checking your individual Copilot settings and confirming the policy for GPT-4.5 is set to “enabled”. Once enabled, users will see GPT-4.5 in the Copilot Chat model selector in VS Code and on github.com.

Scheduled Codespaces maintenance

Codespaces will be undergoing maintenance in Europe and Southeast Asia from 17:00 UTC on Friday, February 28 to 02:00 UTC on Saturday, March 1. Maintenance will begin in North Europe at 17:00 UTC on Friday, February 28. Once it is complete, maintenance will start in Southeast Asia, followed by UK South. Each region will take approximately two to three hours to complete.

During this time period, users may experience connectivity issues with new and existing Codespaces.

If you have uncommitted changes you may need during the maintenance window, you should verify they are committed and pushed before maintenance starts. Codespaces with any uncommitted changes will be accessible as usual once maintenance is complete.

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Changes and deprecation notice for npm replication APIs

We are making changes to npm replication APIs to optimize performance and availability. As part of this update, certain endpoints will be deprecated as of Thursday, May 29, 2025.

To facilitate a seamless transition, the new endpoints will be available starting Tuesday, March 18, 2025, operating in parallel with the existing endpoints. The existing endpoints will be fully deprecated on Thursday, May 29, 2025.

During the transition period, you may access the new endpoints by including the npm-replication-opt-in header with the value true in your requests. This option will be available from Tuesday, March 18, 2025 until the deprecation date, after which only the new endpoints will be available. Effective Thursday, May 29, 2025, the header will be ignored, and all requests will be directed to the new endpoints by default.

This notice is provided to ensure adequate time for necessary updates to replication implementations. We strongly encourage developers to migrate to the new endpoints as early as possible.

How to migrate?

To assist with migration, we have detailed documentation in our replication API migration community discussion, outlining alternative approaches for deprecated endpoints when available. This is the go-to place for questions and discussions.

Additional support for migration

If you have further questions or need additional assistance, please reach out to our support team.

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