GPT-5.5 (High) vs Grok 4.6 (Xhigh)
Which is better for the money: GPT-5.5 (High) by OpenAI or Grok 4.6 (Xhigh) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.
Clear winner
Verdict
Pick Grok 4.6 (Xhigh)
Grok 4.6 (Xhigh) vs GPT-5.5 (High): 19.5% more intelligence, 29.5% less cost to run the AA benchmark, and 23.1% slower end-to-end.
| Metric | GPT-5.5 (High) | Grok 4.6 (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 37.0 | 44.2 | +19.5% Grok 4.6 (Xhigh) is 19.5% more intelligent |
| Total AA cost (lower is better) | $3,181.05 | $2,241.91 | −29.5% Grok 4.6 (Xhigh) is 29.5% cheaper |
| End-to-end time (lower is better) | 35.54s | 43.76s | +23.1% Grok 4.6 (Xhigh) is 23.1% slower |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-5.5 (High) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- Grok 4.6 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
GPT-5.5 (High)Grok 4.6 (Xhigh)Today's Pareto frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-5-high/grok-4-6-xhigh · Markdown: /api/v1/compare/gpt-5-5-high/grok-4-6-xhigh?format=md · llms.txt · agent skill