
7/9/2026
What this post added
This post details Decagon's strategic shift towards using open-source LLMs for approximately 90% of its production workloads, driven by the critical requirement for low-latency models in customer service AI agents. It explains that the primary motivation is not cost, but the necessity of fine-tuning smaller models for specific tasks, which is more feasible with open-weight models. The post contrasts this with the broader enterprise trend of increasing reliance on closed-source frontier models for new, less mature use cases. It posits that as enterprise AI use cases mature, there will be a subsequent migration towards fine-tuned open-source models, though this process is expected to take considerable time due to the effort and expertise required for fine-tuning.