GPT-5.5 (Xhigh) vs Grok 4.3 (Non-reasoning)
Which is better for the money: GPT-5.5 (Xhigh) by OpenAI or Grok 4.3 (Non-reasoning) by SpaceXAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Trade-off
Verdict
Depends on your budget
GPT-5.5 (Xhigh) scores 24.4 points higher (38.4 vs 14.0) but costs 21× as much to run the benchmark ($5294 vs $250; flagship vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.5 (Xhigh) when you need intelligence above 14.0, and Grok 4.3 (Non-reasoning) when 14.0 is enough.
| Metric | GPT-5.5 (Xhigh) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.4 | 14.0 | −63.5% Grok 4.3 (Non-reasoni… is 63.5% less intelligent |
| Total AA cost (lower is better) | $5,294.36 | $250.37 | −95.3% Grok 4.3 (Non-reasoni… is 95.3% cheaper |
| End-to-end time (lower is better) | 57.73s | 5.89s | −89.8% Grok 4.3 (Non-reasoni… is 89.8% faster |
| Price per 1M tokens (in / out) | $5.00 / $30.0 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.3 (Non-reasoning) vs GPT-5.5 (Xhigh): 63.5% less intelligence, 95.3% less cost to run the AA benchmark, and 89.8% faster end-to-end.
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 4.3 (Non-reasoning) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
GPT-5.5 (Xhigh)Grok 4.3 (Non-reasoning)Today's Pareto frontierEvery other model
Matchup
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