REFLEX cuts strong-model calls with Jev

REFLEX makes a strong case for separating bounded decisions from open-ended generation, but its savings are workload-dependent rather than universal.

• –Jev handles fixed choices and confidence gating, while stronger LLMs handle uncertainty and text generation.
• –The 72.7% reduction persisted across three fallback strategies, suggesting the architecture is not tied to one escalation design.
• –Reliability falls with larger action spaces and near-valid alternatives, making calibration and conservative thresholds essential.
• –External evaluations found limited gains over cheap generative cascades when baseline routing is already highly accurate.