--- title: GitHub Copilot retires six models on October 19, 2026 description: GitHub Copilot is retiring six AI models on October 19, 2026: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5, across Copilot Chat,... canonical: https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: GitHub Copilot retires six models on October 19, 2026 | daily.dev og:description: GitHub Copilot is retiring six AI models on October 19, 2026: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5, across Copilot Chat,... og:url: https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz og:image: https://api.daily.dev/og/posts/DSEhOyxdZ.png og:image:alt: GitHub Copilot retires six models on October 19, 2026 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # GitHub Copilot retires six models on October 19, 2026 **[Collections](https://daily.dev/sources/collections)** · 2 min read · 4 upvotes · 0 comments ## Summary GitHub Copilot is retiring six AI models on October 19, 2026: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5, across Copilot Chat, inline edits, ask/agent modes, and code completions. Suggested replacement model names vary between sources (e.g. GPT-6.1 Sol vs GPT-5.6 Sol, Grok 4.7 vs Grok 4.6), so teams should verify against GitHub's own deprecation notice. No action is required to remove deprecated models since they disappear automatically, but enterprise admins may need to enable replacement models via Copilot settings policies or risk users losing model choices. ## Content GitHub retired six Copilot models on October 19, 2026: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5. The change covers Copilot Chat, inline edits, ask and agent modes, and code completions. ## Replacements GitHub's list of supported replacements and one developer's summary of the mapping don't agree on every name, so check the model picker for what is actually available to you. GitHub's notice lists these replacements: - Gemini 3.8 Flash - GPT-6.1 Sol - GPT-6 Luna - Grok 4.7 The @trikcode summary gives a different mapping: - GPT-5.5 and GPT-5.4 become GPT-5.6 Sol - GPT-5 mini and GPT-5.4 mini become GPT-5.6 Luna - Gemini 3.7 Flash becomes Gemini 3.8 Flash - Grok 4.5 becomes Grok 4.6 ## What admins need to do Nobody has to do anything to remove the deprecated models. Enterprise administrators may have to enable the replacements through Copilot settings policies before users can pick them. GitHub also added REST controls for Copilot model policies. They work at the enterprise, organization and team level, so access can be managed through the API as well as the settings pages. ## Other tooling news the same day - Claude Code 2.1.304 adds guided auto-mode setup and warns before expensive session resumes. - Copilot CLI 1.0.100 adds verified plugin install links and fixes stalls caused by hanging MCP servers. - Figma Specs gathers design context in Markdown for teams and coding agents through MCP. - Framefields renders video from TypeScript using native WebGPU, and it's open source. - buddylist puts Claude Code, Codex, Gemini and OpenCode in one desktop group chat. - walkai-talkai lets a handheld radio dictate commands to a Mac's coding agent. - Kai Resolve, from @gleaphq, investigates support tickets using logs, replay and code, then prepares coding tasks. ## Questions this post answers ### Which GitHub Copilot models are being deprecated on October 19, 2026? Six models are being retired: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini, and Grok 4.5. The deprecation affects Copilot Chat, inline edits, ask and agent modes, and code completions. Deprecated models disappear automatically, so no manual removal action is required. _Admins tracking Copilot model changes can follow deprecation details like these on daily.dev._ ### What do I need to do as an admin when GitHub Copilot deprecates a model my team uses? Enterprise administrators may need to manually enable the replacement models through Copilot settings policies, since the swap is not fully automatic. If a replacement model is blocked by policy, users in the organization could end up with fewer model choices than they had before the deprecation. _Teams migrating off deprecated Copilot models can keep policy checklists like this on daily.dev._ ### What model replaces GPT-5.4 or GPT-5.5 in GitHub Copilot? Reports disagree: one account names GPT-6.1 Sol as the replacement, while another names GPT-5.6 Sol. Similarly, GPT-5 mini and GPT-5.4 mini are replaced by either GPT-6 Luna or GPT-5.6 Luna depending on the source, so the exact version should be confirmed against GitHub's own deprecation notice. _Developers choosing a Copilot model after a deprecation can compare conflicting reports via daily.dev._ ## Similar posts on daily.dev - [Upcoming deprecation of selected GitHub Copilot models in mid-October](https://daily.dev/posts/upcoming-deprecation-of-selected-github-copilot-models-in-mid-october-0ps4xzxpb) · GitHub Changelog · 0 upvotes · 0 comments - [Upcoming deprecation of Gemini 3 Pro and GPT-5.1 models](https://daily.dev/posts/upcoming-deprecation-of-gemini-3-pro-and-gpt-5-1-models-fobhu97ll) · GitHub Changelog · 0 upvotes · 0 comments - [Upcoming deprecation of selected GitHub Copilot models](https://daily.dev/posts/upcoming-deprecation-of-selected-github-copilot-models-dawvbv51e) · GitHub Changelog · 0 upvotes · 0 comments - [GitHub removes some models from free Copilot student plan](https://daily.dev/posts/github-removes-some-models-from-free-copilot-student-plan-m6khs2qzm) · The Register · 0 upvotes · 0 comments --- Tags: [#github](https://daily.dev/tags/github), [#google-gemini](https://daily.dev/tags/google-gemini), [#gpt](https://daily.dev/tags/gpt), [#grok](https://daily.dev/tags/grok) [View this post on daily.dev](https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"GitHub Copilot retires six models on October 19, 2026","url":"https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz"},"datePublished":"2026-10-19T22:28:39.318Z","dateModified":"2026-10-23T21:28:35.268Z","description":"GitHub Copilot is retiring six AI models on October 19, 2026: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini and Grok 4.5, across Copilot Chat,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f2cba731c85dd2d4d88d639427ea90bb?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f2cba731c85dd2d4d88d639427ea90bb?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Collections","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Collections","logo":"https://media.daily.dev/image/upload/s--fk_6ycEi--/f_auto,q_auto/v1780996001/logos/collections?_a=BAMAMiWQ0","url":"https://daily.dev/sources/collections"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":4},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"github,google-gemini,gpt,grok","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Collections","item":"https://daily.dev/sources/collections"},{"@type":"ListItem","position":3,"name":"GitHub Copilot retires six models on October 19, 2026"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/github-copilot-retires-six-models-on-october-19-2026-dsehoyxdz#faq","mainEntity":[{"@type":"Question","name":"Which GitHub Copilot models are being deprecated on October 19, 2026?","acceptedAnswer":{"@type":"Answer","text":"Six models are being retired: Gemini 3.7 Flash, GPT-5.5, GPT-5.4, GPT-5.4 mini, GPT-5 mini, and Grok 4.5. 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