SNACK Quick Summary
- GitHub marked GPT-5.2 and GPT-5.2-Codex as deprecated across most Copilot experiences on June 5.
- The recommended replacements are GPT-5.5 and GPT-5.3-Codex, so teams may need to recheck model policies and workflow behavior instead of just reading this as a naming update.
- For readers who use Copilot deeply, the practical question is whether chat tone, agent-mode behavior and code-output style now shift under the same prompts.
Editor quick take
The useful angle is simple: a familiar Copilot setup may now route work through different models, even when the button in front of you still looks the same.
What changed inside Copilot
GitHub says the deprecation affects major Copilot surfaces including Copilot Chat, inline edits, ask mode, agent mode and code completions. The official guidance is to move from GPT-5.2 to GPT-5.5 and from GPT-5.2-Codex to GPT-5.3-Codex.
On paper that can look like a small label swap. In practice, teams that tuned prompts or automation around older behavior may see differences in response length, reasoning style or code shape under the new defaults.
Why this matters more than another model-launch headline
A new model announcement is optional reading for some users. A retirement notice is different because it changes the floor under existing habits. Workflows that felt stable can drift without a visible interface redesign.
GitHub Docs already reflects the newer lineup, which makes this more than a one-off changelog post. It looks like a real lineup cleanup that operators should verify in policy and day-to-day usage.
What users should check first
Individual users can start by re-running their most familiar tasks in chat, edits and agent mode to see whether the answer tone or patch quality changed. Teams and admins should also confirm whether the replacement models are allowed in current model policies.
The safe summary is that this is an operations notice about Copilot routing and behavior, not just a shiny release note about one more model name.
Sources and checked date · Checked on: 2026-06-07 KST
- https://github.blog/changelog/2026-06-05-gpt-5-2-and-gpt-5-2-codex-deprecated/
- https://docs.github.com/en/copilot/reference/ai-models/supported-models
Cross-checked the GitHub changelog and supported-models documentation for the replacement path and current Copilot model lineup.
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