GPT-5.4 (xhigh) vs Grok 4.5 (high)

OpenAI · SpaceXAI · catalog 2026-09-14

Grok 4.5 (high) beats GPT-5.4 (xhigh): cheaper ($1.21 vs $2.175/M) and at least as smart (index 39.1 vs 39).

	GPT-5.4 (xhigh)	Grok 4.5 (high)
Speed (tok/s)	131.5 measured	54.8 measured
Blended $/M	$2.175 derived	$1.21 derived
Intelligence index	39 measured	39.1 measured
TTFT (ms)	9001 measured	1111 measured
Context	1050k list	500k list
Coding index	71 measured	72 measured
Agentic index	not measured for both

GPT-5.4 (xhigh) card · Grok 4.5 (high) 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.