# GitHub retires six Copilot models, moves users to GPT-5.6 and Gemini 3.8

Digest AI · Agents & Tools · published 2026-10-18T20:07:00Z

Canonical: https://digestai.news/story/github-retires-six-copilot-models-moves-users-to-gpt-5-6-and-gemini-3

## Summary

GitHub pulled six Copilot AI models—GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini, Gemini 3.7 Flash, and Grok 4.5—out of production on October 19, 2026. The company said the cutover is part of a broader effort to simplify the model lineup across VS Code, JetBrains IDEs, the CLI and chat integrations in Slack and Teams. Developers are now directed to GPT-5.6 Sol, GPT-5.6 Luna, and Gemini 3.8 Flash as the default options. Business and Enterprise customers receive automatic migration, while individual subscribers and teams with hard‑coded model names must update their policy settings or CI scripts.

The timing aligns with JetBrains launching its AI Assistant preview in VS Code and Meta’s Muse Code terminal agent, both aiming at the same coding‑assistant market. Data cited by Rising Trends shows “AI coding” searches up roughly 400% year‑over‑year and 308% over the past three months, with “Codex” queries reaching an estimated 550,000 per month, up about 809% YoY. The rapid model turnover signals a faster, messier phase for AI coding tools, pushing developers to verify compliance documents and spot‑check output as the new models may behave differently.

## Key points

- Six Copilot models (GPT‑5.5, GPT‑5.4, GPT‑5.4 mini, GPT‑5 mini, Gemini 3.7 Flash, Grok 4.5) retired on Oct 19 2026.
- GitHub automatically migrates Business and Enterprise users to GPT‑5.6 Sol, GPT‑5.6 Luna, and Gemini 3.8 Flash; others must update configs.
- Cutover coincides with JetBrains AI Assistant preview in VS Code and Meta’s Muse Code launch amid a 400% YoY rise in “AI coding” searches.

## Why it matters

The mass retirement reshapes Copilot's model ecosystem, forcing developers to adjust integrations and influencing pricing and performance while intensifying competition among AI coding assistants.

## Sources

1. [GitHub Copilot Retires 6 Models, Shifts to GPT-5.6](https://shattered.io/github-copilot-retires-6-models-gpt-5-6-2026) (shattered.io, 2026-10-18)

## Cite

Digest AI, "GitHub retires six Copilot models, moves users to GPT-5.6 and Gemini 3.8", 18 October 2026, https://digestai.news/story/github-retires-six-copilot-models-moves-users-to-gpt-5-6-and-gemini-3

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