GPT-5.6 Sol (Max) vs Grok 4.3 (High)

Which is better for the money: GPT-5.6 Sol (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.

Trade-off

OpenAIGPT-5.6 Sol (Max)Off the frontier

Intelligence: 47.00
Total cost: $3465

SpaceXAIGrok 4.3 (High)Off the frontier

Intelligence: 24.90
Total cost: $363

Verdict

Depends on your budget

GPT-5.6 Sol (Max) scores 22.1 points higher (47.0 vs 24.9) but costs 9.5× as much to run the benchmark ($3465 vs $363; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.6 Sol (Max) when you need intelligence above 24.9, and Grok 4.3 (High) when 24.9 is enough.

Metric	GPT-5.6 Sol (Max)	Grok 4.3 (High)	Difference
Intelligence (higher is better)	47.0	24.9	−47.0% Grok 4.3 (High) is 47.0% less intelligent
Total AA cost (lower is better)	$3,464.84	$363.24	−89.5% Grok 4.3 (High) is 89.5% cheaper
End-to-end time (lower is better)	91.96s	24.88s	−72.9% Grok 4.3 (High) is 72.9% faster
Price per 1M tokens (in / out)	$4.00 / $20.0	$1.25 / $2.50
Input modalities	Text, Image	Text, Image

Grok 4.3 (High) vs GPT-5.6 Sol (Max): 47.0% less intelligence, 89.5% less cost to run the AA benchmark, and 72.9% faster end-to-end.

Open this matchup in the interactive picker GPT-5.6 Sol (Max): what beats it Grok 4.3 (High): what beats it

Today's Pareto frontier

Against the frontier

GPT-5.6 Sol (Max) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
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-5.6 Sol (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-5-6-sol/grok-4-3 · Markdown: /api/v1/compare/gpt-5-6-sol/grok-4-3?format=md · llms.txt · agent skill