Claude Sonnet 3.7 deprecation notice for GitLab Duo

What this post added

This post announces the deprecation of Claude Sonnet 3.7 support in GitLab Duo features, scheduled for GitLab 18.8 (January 15, 2026). It recommends immediate migration to Claude 4.0+ models to ensure continued service and access to the latest AI capabilities. The timeline and additional resources for Anthropic's model deprecations and GitLab Duo model selection are provided.