Mythos-class Claude Fable 5 arrives on GitLab Duo Agent Platform

This post announces the availability of Anthropic's Claude Fable 5 model on the GitLab Duo Agent Platform. Key technical contributions include: enhanced first-shot correctness for complex problems, improved accuracy on technical images and screenshots, long-horizon autonomy for multi-day agent workflows, self-correction capabilities, reliable dispatch of parallel sub-agents, and improved bug-finding recall for outage triage and code review. The model's ability to sustain instruction adherence across millions of tokens and self-correct through verification loops are significant advancements for AI agent reliability.