GPT-5.4 mini (xhigh) vs Grok 4.3 (low)

OpenAI · SpaceXAI · catalog 2026-09-14

Trade-off: Grok 4.3 (low) is cheaper ($0.64 vs $0.649/M); GPT-5.4 mini (xhigh) scores higher on intelligence (24.6 vs 24.3).

	GPT-5.4 mini (xhigh)	Grok 4.3 (low)
Speed (tok/s)	186.3 measured	106 measured
Blended $/M	$0.649 derived	$0.64 derived
Intelligence index	24.6 measured	24.3 measured
TTFT (ms)	12704 measured	506 measured
Context	400k list	—
Coding index	not measured for both
Agentic index	not measured for both

GPT-5.4 mini (xhigh) card · Grok 4.3 (low) 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.