GPT-5.6 Sol (xhigh) vs Grok 4.6 (xhigh)

OpenAI · SpaceXAI · catalog 2026-09-14

Grok 4.6 (xhigh) beats GPT-5.6 Sol (xhigh): cheaper ($1.35 vs $3.08/M) and at least as smart (index 44.3 vs 44.1).

	GPT-5.6 Sol (xhigh)	Grok 4.6 (xhigh)
Speed (tok/s)	61.1 measured	54 measured
Blended $/M	$3.08 derived	$1.35 derived
Intelligence index	44.1 measured	44.3 measured
TTFT (ms)	411 measured	3775 measured
Context	—	—
Coding index	78 measured	76 measured
Agentic index	48 measured	53 measured

GPT-5.6 Sol (xhigh) card · Grok 4.6 (xhigh) 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.