---
title: "Upcoming deprecation of selected GitHub Copilot models in mid-October"
slug: "github-copilot-streicht-mitte-oktober-mehrere-modelle-darunter-gpt-55"
date: 2026-09-18
category: developer
tags: [agents]
language: en
sources_count: 1
featured: false
publisher: AInauten News
url: https://news.ainauten.com/en/story/github-copilot-streicht-mitte-oktober-mehrere-modelle-darunter-gpt-55
---

# Upcoming deprecation of selected GitHub Copilot models in mid-October

**Published**: 2026-09-18 | **Category**: developer | **Sources**: 1

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## TL;DR

GitHub will deprecate several models across all Copilot experiences, including Chat, inline edits, ask and agent modes and code completions, on October 19, 2026. Affected are Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5. Suggested replacements are Gemini 3.8 Flash, GPT-5.6 Sol, GPT-5.6 Luna and Grok 4.6. For Copilot Business and Enterprise the alternatives are enabled automatically unless admins have disabled default models; otherwise admins need to enable them in the model policies.

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## Summary

GitHub will deprecate several models across all Copilot experiences, including Chat, inline edits, ask and agent modes and code completions, on October 19, 2026. Affected are Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5. Suggested replacements are Gemini 3.8 Flash, GPT-5.6 Sol, GPT-5.6 Luna and Grok 4.6. For Copilot Business and Enterprise the alternatives are enabled automatically unless admins have disabled default models; otherwise admins need to enable them in the model policies.

---

## Why it matters

GitHub will deprecate several models across all Copilot experiences, including Chat, inline edits, ask and agent modes and code completions, on October 19, 2026. Affected are Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5. Suggested replacements are Gemini 3.8 Flash, GPT-5.6 Sol, GPT-5.6 Luna and Grok 4.6. For Copilot Business and Enterprise the alternatives are enabled automatically unless admins have disabled default models; otherwise admins need to enable them in the model policies.

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## Key Points

- GitHub will deprecate several models across all Copilot experiences, including Chat, inline edits, ask and agent modes and code completions, on October 19, 2026. Affected are Gemini 3.7 Flash, GPT-5.5

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## Nauti's Take

The switch moves teams to newer models such as GPT-5.6 Sol and Gemini 3.8 Flash, which should be an advantage in quality and speed for most. The challenge is pinned workflows: anyone who hardcoded model names in integrations or policies risks breakage on October 19. Admins in organizations with default models disabled should review their model policies now.

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## FAQ

**Q:** What is Upcoming deprecation of selected GitHub Copilot models in mid-October about?

**A:** GitHub will deprecate several models across all Copilot experiences, including Chat, inline edits, ask and agent modes and code completions, on October 19, 2026. Affected are Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5. Suggested replacements are Gemini 3.8 Flash, GPT-5.6 Sol, GPT-5.6 Luna and Grok 4.6. For Copilot Business and Enterprise the alternatives are enabled automatically unless admins have disabled default models; otherwise admins need to enable them in the model policies.

**Q:** Why does it matter?

**A:** GitHub will deprecate several models across all Copilot experiences, including Chat, inline edits, ask and agent modes and code completions, on October 19, 2026. Affected are Gemini 3.7 Flash, GPT-5.5

**Q:** What are the key takeaways?

**A:** See summary above.

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## Related Topics

- [agents](https://news.ainauten.com/en/tag/agents)

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## Sources

- [Upcoming deprecation of selected GitHub Copilot models in mid-October](https://github.blog/changelog/2026-09-18-upcoming-deprecation-of-selected-github-copilot-models-in-mid-october) - GitHub Changelog

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## About This Article

This article is a synthesis of 1 sources, curated and summarized by AInauten News. We aggregate AI news from trusted sources and provide bilingual (German/English) coverage.

**Publisher**: [AInauten](https://www.ainauten.com) | **Site**: [news.ainauten.com](https://news.ainauten.com)

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*Last Updated: 2026-09-19*