GPT-5 Series Release Timeline 2025-2026 | Generated by AI
Let me search for the specific release dates of these GPT-5 models in GitHub Copilot.Here’s the timeline of when GitHub rolled out these models:
GPT-5.1 series:
- November 13, 2025 - GPT-5.1, GPT-5.1-Codex, and GPT-5.1-Codex-Mini launched in public preview
- December 4, 2025 - GPT-5.1-Codex-Max entered public preview
- December 17, 2025 - GPT-5.1 and GPT-5.1-Codex became generally available
- December 17, 2025 - GPT-5.1-Codex-Max became generally available
GPT-5.2 series:
- December 11, 2025 - GPT-5.2 launched in public preview
- December 17, 2025 - GPT-5.2 became generally available
- January 14, 2026 - GPT-5.2-Codex became generally available
So it all happened quite recently - the entire GPT-5 rollout in GitHub Copilot took place over about two months from mid-November 2025 through mid-January 2026!