--- title: "Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra leave GitHub Copilot on 2026-11-16 | Harbyn" description: "Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra leave GitHub Copilot on 2026-11-16." canonical: "https://harbyn.com/changes/github/2026-10-15-upcoming-deprecation-of-selected-github-copilot-models-in-mid-november" last-updated: 2026-10-16 --- # Claude Opus 4.8, Claude Opus 5 and GPT-5.6 Terra leave GitHub Copilot on 2026-11-16 Markdown version of . Retirement - GitHub. high severity. Announced. Upcoming. GitHub will deprecate Claude Opus 4.8, Claude Opus 5, and GPT-5.6 Terra across GitHub Copilot experiences on November 16, 2026. Claude Opus 4.8 will remain available to individual GitHub Copilot subscribers on annual plans. Suggested alternatives are Claude Opus 5.5 for Claude Opus 4.8 and Claude Opus 5, and GPT-6.1 Sol or GPT-6 Luna for GPT-5.6 Terra. 22 days left: the deadline is Nov 16, 2026. ## Facts | Fact | Value | | --- | --- | | Vendor | [GitHub](https://harbyn.com/vendors/github.md) | | Kind | Retirement | | Severity | high | | Status | Announced | | Announced | Oct 15, 2026 | | Effective | Nov 16, 2026 | | Added to Harbyn | Oct 16, 2026 | | Lead time | 31 days of warning | | Vendor page | | | Review | Reviewed by a person, extracted by a model | ## Find it in your code ```sh npx harbyn scan ``` This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses GitHub, from its packages and API hosts. Nothing leaves your machine. ## Sources Where this event comes from: the page we read, when we read it, and the hash of that snapshot. - (changelog, fetched 2026-10-16 04:38 UTC, sha256 `617ddcac16831eda284364d53db8484adf5257dda0f967e1303d7ff0b7e29432`) ## Related changes ### More from GitHub - [Email notifications for repository push events retired](https://harbyn.com/changes/github/2026-10-15-email-notifications-for-repository-push-events-have-been-retired.md) (Retirement, effective Oct 15, 2026) - [Copilot managed settings can force a policy refresh at startup and require a minimum client version](https://harbyn.com/changes/github/2026-10-13-enterprise-managed-settings-enforcement-updates.md) (Behavior change, announced Oct 13, 2026) - [Withdrawn Dependabot alerts return 410 Gone and send a withdrawn webhook action](https://harbyn.com/changes/github/2026-10-13-improved-detection-for-withdrawn-dependabot-alerts.md) (Behavior change, announced Oct 13, 2026) - [Push protection blocks Anthropic API keys by default; secret scanning adds Salesforce and Cloudsmith](https://harbyn.com/changes/github/2026-10-13-secret-scanning-blocks-anthropic-keys-by-default-adds-salesforce.md) (Behavior change, announced Oct 13, 2026) ### Changes at other vendors - [OpenRouter: arcee-ai/trinity-large-thinking expire 2026-10-26](https://harbyn.com/changes/openrouter/2026-10-23-arcee-ai-trinity-large-thinking-expires-2026-10-26.md) (effective Oct 26, 2026) - [Google Cloud Run and Functions: Node.js 20 runtime decommission](https://harbyn.com/changes/google-cloud/2026-10-08-node-js-20-runtime-decommission.md) (effective Oct 30, 2026) - [Mistral AI: Z.ai GLM 5.2 (zai-glm-5-2) retires on Mistral on October 31, 2026](https://harbyn.com/changes/mistral/2026-09-29-z-ai-glm-5-2-deprecated-and-scheduled-for-retirement.md) (effective Oct 31, 2026) - [Fireworks AI: DeepSeek V4 Flash 0731 retires from Serverless Training November 2](https://harbyn.com/changes/fireworks/2026-10-18-upcoming-serverless-training-deprecation-deepseek-v4-flash-0731.md) (effective Nov 2, 2026) [All upcoming deadlines](https://harbyn.com/deadlines.md)