GPT-5.4 Rollout

OpenAI's latest agentic coding model, GPT-5.4, is now generally available in GitHub Copilot. Early testing demonstrates new success rates in real-world agentic and software development scenarios, with notable improvements in logical reasoning and task execution for intricate, multi-step, tool-dependent processes.

Where to Use GPT-5.4

The model is available across a comprehensive range of development environments and platforms:

• IDEs & Editors: Visual Studio Code (v1.104.1+), Visual Studio (17.14.19+), JetBrains (1.5.66+), Xcode (0.48.0+), Eclipse (0.15.1+)
• Web & Mobile: GitHub.com, GitHub Mobile (iOS and Android)
• Command Line: GitHub CLI and GitHub Copilot Coding Agent

Developers can select GPT-5.4 from the model picker in all modes including chat, ask, edit, and agent capabilities.

Access & Requirements

GPT-5.4 is available to Copilot Pro, Pro+, Business, and Enterprise subscribers. Enterprise and Business plan administrators must explicitly enable the GPT-5.4 policy in Copilot settings before their users can access it.

While the model appears in all supported versions, GitHub recommends upgrading to the latest version of each tool for optimal prompting and model parameter performance.

Action Items

• Individual Users: Update to the latest version of your IDE/editor and select GPT-5.4 from the model picker to start using the new capabilities
• Administrators: Enable GPT-5.4 access in Copilot settings for your Business or Enterprise organization
• Feedback: Share experience and feedback in the GitHub Community