LLM production optimizer that captures agent traces, trains a cheaper fine-tuned successor model you own, and deploys it only when it beats your benchmark.
Understudy installs a proxy that captures production traces from existing LLM workflows, evaluates them to set a quality benchmark, and trains fine-tuned successor models on prompts and weights the customer owns. A replacement model is deployed only after it beats the held-out eval in A/B testing against the frontier baseline. The platform optimizes the complete production route including prompts, tool-call adapters, reasoning modes, batching, context management, and serving paths; it can run locally or on cloud infrastructure. Understudy is a product of Understudy Labs.