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github: GPT-5.3-Codex long-term support in GitHub Copilot

1 · Sujith Quintelier · March 19, 2026, 4:07 p.m.

github GPT-5.3-Codex GitHub Copilot Long Term Support

Summary

GitHub has rolled out GPT-5.3-Codex as a long-term support (LTS) model for GitHub Copilot, designed to provide enterprises with a stable option for internal security and safety reviews, available for Copilot Business and other Copilot plans.

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