GPT-5.6 Terra (High) vs Grok 4.5 (High)
Which is better for the money: GPT-5.6 Terra (High) by OpenAI or Grok 4.5 (High) 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
Grok 4.5 (High) scores 4.6 points higher (38.8 vs 34.2) but costs 1.6× as much to run the benchmark ($1244 vs $768; both premium class). Pick Grok 4.5 (High) when the extra intelligence is worth the premium, otherwise GPT-5.6 Terra (High).
| Metric | GPT-5.6 Terra (High) | Grok 4.5 (High) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.2 | 38.8 | +13.5% Grok 4.5 (High) is 13.5% more intelligent |
| Total AA cost (lower is better) | $767.78 | $1,243.85 | +62.0% Grok 4.5 (High) is 62.0% more expensive |
| End-to-end time (lower is better) | 6.43s | 20.04s | +211.7% Grok 4.5 (High) is 211.7% slower |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.5 (High) vs GPT-5.6 Terra (High): 13.5% more intelligence, 62.0% more cost to run the AA benchmark, and 211.7% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Terra (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
- Grok 4.5 (High) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.6 Terra (High)Grok 4.5 (High)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-5-6-terra-high/grok-4-5 · Markdown: /api/v1/compare/gpt-5-6-terra-high/grok-4-5?format=md · llms.txt · agent skill