GPT-6 Luna (Max) vs Grok 4.3 (High)

Which is better for the money: GPT-6 Luna (Max) by OpenAI or Grok 4.3 (High) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.

Clear winner

OpenAIGPT-6 Luna (Max)On the frontier

Intelligence: 38.10
Total cost: $122

SpaceXAIGrok 4.3 (High)Off the frontier

Intelligence: 24.90
Total cost: $363

Verdict

Pick GPT-6 Luna (Max)

Grok 4.3 (High) vs GPT-6 Luna (Max): 34.6% less intelligence, 197.6% more cost to run the AA benchmark, and 69.7% faster end-to-end.

Metric	GPT-6 Luna (Max)	Grok 4.3 (High)	Difference
Intelligence (higher is better)	38.1	24.9	−34.6% Grok 4.3 (High) is 34.6% less intelligent
Total AA cost (lower is better)	$122.05	$363.24	+197.6% Grok 4.3 (High) is 3.0× more expensive
End-to-end time (lower is better)	82.02s	24.88s	−69.7% Grok 4.3 (High) is 69.7% faster
Price per 1M tokens (in / out)	$0.10 / $0.50	$1.25 / $2.50
Input modalities	Text, Image	Text, Image

Open this matchup in the interactive picker GPT-6 Luna (Max): what beats it Grok 4.3 (High): what beats it

Today's Pareto frontier

Against the frontier

GPT-6 Luna (Max) is on today's frontier: nothing is both smarter and cheaper.
Grok 4.3 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Medium) scores 47.80 for $361.

GPT-6 Luna (Max)Grok 4.3 (High)Today's Pareto frontierEvery other model

Matchup

Compare something else

Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-luna/grok-4-3 · Markdown: /api/v1/compare/gpt-6-luna/grok-4-3?format=md · llms.txt · agent skill