GPT-5.6 Terra (Xhigh) vs Grok 4.3 (Non-reasoning)
Which is better for the money: GPT-5.6 Terra (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 2026-10-27.
Trade-off
Verdict
Depends on your budget
GPT-5.6 Terra (Xhigh) scores 24.0 points higher (38.0 vs 14.0) but costs 5.5× as much to run the benchmark ($1187 vs $216; premium vs mid-range cost classes). They are not alternatives at one budget: pick GPT-5.6 Terra (Xhigh) when you need intelligence above 14.0, and Grok 4.3 (Non-reasoning) when 14.0 is enough.
| Metric | GPT-5.6 Terra (Xhigh) | Grok 4.3 (Non-reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.0 | 14.0 | −63.2% Grok 4.3 (Non-reasoni… is 63.2% less intelligent |
| Total AA cost (lower is better) | $1,186.77 | $215.93 | −81.8% Grok 4.3 (Non-reasoni… is 81.8% cheaper |
| End-to-end time (lower is better) | 33.63s | 5.71s | −83.0% Grok 4.3 (Non-reasoni… is 83.0% faster |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $1.25 / $2.50 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.3 (Non-reasoning) vs GPT-5.6 Terra (Xhigh): 63.2% less intelligence, 81.8% less cost to run the AA benchmark, and 83.0% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Terra (Xhigh) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
- 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-5.6 Terra (Xhigh)Grok 4.3 (Non-reasoning)Today's Pareto frontierEvery other model
Matchup
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