GPT-5 nano (medium) vs o3-mini

OpenAI · OpenAI · catalog 2026-09-14

GPT-5 nano (medium) beats o3-mini: cheaper ($0.057 vs $1.045/M) and at least as smart (index 12.5 vs 12.5).
GPT-5 nano (medium)o3-mini
Speed (tok/s)130.9 measured219.1 measured
Blended $/M$0.057 derived$1.045 derived
Intelligence index12.5 measured12.5 measured
TTFT (ms)388 measured52 measured
Context—200k list
Coding indexnot measured for both
Agentic indexnot measured for both

GPT-5 nano (medium) card · o3-mini card · 3D observatory

Verdicts use price×intelligence dominance only, and only where both sides are measured; null cells stay null with their provenance (em-dash = not in catalog). Percentile-free by design — this page compares two models, not the field. Generated page — do not hand-edit.