Conceptfallback架构 / 级联模型架构 / 分层模型架构

Hierarchical Fallback Architecture

A system design pattern that combines lightweight specialized models with large models. A confidence-based routing mechanism directs simple, high-confidence tasks to the smaller model while forwarding complex or edge-case inputs to the larger model, thereby balancing cost, latency, and accuracy.

Timeline (last 90 days)

Oct 9

The optimal solution is not to fully replace LLMs with decision models, but to build a tiered fallback architecture: decision model → confidence check → LLM as fallback

Unverified50%

All Facts (1)

Unverified

The optimal solution is not to fully replace LLMs with decision models, but to build a tiered fallback architecture: decision model → confidence check → LLM as fallback

50%

Source Articles

Decision Models vs. LLMs: What 4.8× Speed and 7.4× Cost Savings Actually Tell UsOct 9