Microsoft's code assistance tool GitHub Copilot has integrated this latest large-scale language model into its service within hours of OpenAI's release of the GPT‑5.4 model, providing developers with the ability to use this flagship model for intelligent programming assistance. GitHub said that in early internal testing, GPT‑5.4's success rate in "agent-based" software development scenarios has been significantly improved, and it can demonstrate higher completion quality in more complex multi-step tasks.
According to reports, GPT‑5.4 inherits and strengthens the latest progress of the previous Codex series models in terms of reasoning capabilities, code generation and "agent-style" workflow, and integrates them into general large models, enabling it to provide high-precision support in a wider range of professional tasks. GitHub said that the model's logical reasoning and task execution capabilities have been significantly improved when processing processes that require multi-step tool calling, especially in complex work, in-depth web page retrieval, and computer operations. It is more efficient and accurate.
Currently, GPT‑5.4 is open to subscribers at different levels such as Copilot Pro, Pro+, Business and Enterprise, and can be enabled in a variety of development environments and platforms. Specific support includes: in Visual Studio Code v1.104.1 and above, it can be used in all modes such as chat, question, edit and proxy; in Visual Studio 17.14.19 and above, it can be called in proxy and question mode; in JetBrains series IDE 1.5.66 and above, it can be used in question, edit and proxy modes; in Xcode 0.48.0 and above and Eclipse In version 0.15.1 and above, GPT‑5.4 can be used in question and proxy modes. In addition, users can also experience the model on the GitHub website, GitHub mobile terminals (iOS and Android), GitHub command line tools, and GitHub Copilot Coding Agent.
For enterprises and teams that want to uniformly enable GPT‑5.4 at the organizational level, GitHub prompts that the administrator needs to open the corresponding GPT‑5.4 usage policy in the Copilot management background before opening access permissions to members. GitHub has released an update announcement on the official blog to introduce the availability and configuration of this model in Copilot. Users in need can go to view detailed instructions:
https://github.blog/changelog/2026-03-05-gpt-5-4-is-generally-available-in-github-copilot/