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

Which is better for the money: GPT-6 Astra (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 2026-10-25.

Trade-off

OpenAIGPT-6 Astra (Max)Off the frontier

Intelligence: 52.70
Total cost: $5324

SpaceXAIGrok 4.3 (High)Off the frontier

Intelligence: 24.90
Total cost: $363

Verdict

Depends on your budget

GPT-6 Astra (Max) scores 27.8 points higher (52.7 vs 24.9) but costs 15× as much to run the benchmark ($5324 vs $363; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Max) when you need intelligence above 24.9, and Grok 4.3 (High) when 24.9 is enough.

Metric	GPT-6 Astra (Max)	Grok 4.3 (High)	Difference
Intelligence (higher is better)	52.7	24.9	−52.8% Grok 4.3 (High) is 52.8% less intelligent
Total AA cost (lower is better)	$5,324.10	$363.24	−93.2% Grok 4.3 (High) is 93.2% cheaper
End-to-end time (lower is better)	285.78s	28.87s	−89.9% Grok 4.3 (High) is 89.9% faster
Price per 1M tokens (in / out)	$10.0 / $50.0	$1.25 / $2.50
Input modalities	Text, Image	Text, Image

Grok 4.3 (High) vs GPT-6 Astra (Max): 52.8% less intelligence, 93.2% less cost to run the AA benchmark, and 89.9% faster end-to-end.

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

Today's Pareto frontier

Against the frontier

GPT-6 Astra (Max) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
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 Astra (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-astra/grok-4-3 · Markdown: /api/v1/compare/gpt-6-astra/grok-4-3?format=md · llms.txt · agent skill