Agentic Chat (Claude Haiku 4.5) is one of several Anthropic-backed models surfaced inside the GitLab Duo assistant, where it sits alongside heavier Claude siblings in the same provider catalog. It carries the claude-haiku family label and is positioned as a lighter, faster option for routine DevSecOps interactions such as code suggestions, review assistance, and security analysis, while still inheriting the general capabilities of the Haiku line. The "agentic" framing in the listing name reflects that the model is wired into GitLab's tool-calling flow rather than being a plain chat endpoint.

In practical terms, this endpoint is meant for engineers and security teams who want a responsive model that can read code, diffs, and attached documents without paying enterprise API rates. It runs as a closed, proprietary API inside GitLab Duo with a large context window that comfortably fits substantial repositories or long threads, and it supports both image and PDF attachments on top of plain text. Tool calling and reasoning are explicitly enabled, so the model can break down multi-step tasks and invoke GitLab platform actions, which is what makes it suitable as the everyday workhorse model in the Duo lineup.