GPT-5.6 Terra (High) vs Grok 4.6 (Low)
Which is better for the money: GPT-5.6 Terra (High) by OpenAI or Grok 4.6 (Low) 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 (Low)
Grok 4.6 (Low) vs GPT-5.6 Terra (High): 2.6% more intelligence, 20.0% less cost to run the AA benchmark, and 72.9% slower end-to-end.
| Metric | GPT-5.6 Terra (High) | Grok 4.6 (Low) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 34.2 | 35.1 | +2.6% Grok 4.6 (Low) is 2.6% more intelligent |
| Total AA cost (lower is better) | $767.78 | $613.92 | −20.0% Grok 4.6 (Low) is 20.0% cheaper |
| End-to-end time (lower is better) | 7.30s | 12.62s | +72.9% Grok 4.6 (Low) is 72.9% slower |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
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 4.6 (Low) is off the frontier: at the same or lower cost, GPT-6.1 Sol (High) scores 50.20 for $521.
GPT-5.6 Terra (High)Grok 4.6 (Low)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-4-6-low · Markdown: /api/v1/compare/gpt-5-6-terra-high/grok-4-6-low?format=md · llms.txt · agent skill