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#instruction-following
1 articles
01
2026-09-03
·
Inference & Serving
·
★ MEMBER
·
PAPER
·
14 min read
Paper Walkthrough: From Production Traffic to Post-Training — Folding 200 Internal Apps Into One Self-Hosted LLM
How a company forced to self-host by data-residency rules collapsed a sprawling model fleet into one checkpoint: classify production failures by hand, train one GRPO expert per weak axis, then merge the weights with SLERP. Includes three real reward-hacking failures.