RES — The most consequential cost-effectiveness finding: qwen2.5:1.5b
The most consequential cost-effectiveness finding: qwen2.5:1.5b — never a top-three absolute-quality model — dominates two of three quality-per-gram-CO2 rankings (triage and estimation), so the cheapest catalog model is the most carbon-efficient for two of three PMO tasks.
Source: puma docs/results/phase_b_analysis.md · Traceability: corpus unit
PUMA-054· Confidence: repo-backed