GPT-5.5 (Xhigh) vs Grok 4.6 (Xhigh)
Which is better for the money: GPT-5.5 (Xhigh) by OpenAI or Grok 4.6 (Xhigh) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick Grok 4.6 (Xhigh)
Grok 4.6 (Xhigh) vs GPT-5.5 (Xhigh): 15.1% more intelligence, 57.7% less cost to run the AA benchmark, and 34.4% faster end-to-end.
| Metric | GPT-5.5 (Xhigh) | Grok 4.6 (Xhigh) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.4 | 44.2 | +15.1% Grok 4.6 (Xhigh) is 15.1% more intelligent |
| Total AA cost (lower is better) | $5,294.36 | $2,241.91 | −57.7% Grok 4.6 (Xhigh) is 57.7% cheaper |
| End-to-end time (lower is better) | 57.73s | 37.86s | −34.4% Grok 4.6 (Xhigh) is 34.4% faster |
| 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 (Xhigh) is off the frontier: at the same or lower cost, Claude Opus 5.5 (Xhigh, Default Fallback) scores 56.00 for $4057.
- 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 (Xhigh)Grok 4.6 (Xhigh)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-5-5/grok-4-6-xhigh · Markdown: /api/v1/compare/gpt-5-5/grok-4-6-xhigh?format=md · llms.txt · agent skill