GPT-5.6 Terra (Low) vs Grok 4.6 (Medium)
Which is better for the money: GPT-5.6 Terra (Low) by OpenAI or Grok 4.6 (Medium) 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 4.6 (Medium) scores 15.3 points higher (42.8 vs 27.5) but costs 4.4× as much to run the benchmark ($1557 vs $350; premium vs mid-range cost classes). They are not alternatives at one budget: pick Grok 4.6 (Medium) when you need intelligence above 27.5, and GPT-5.6 Terra (Low) when 27.5 is enough.
| Metric | GPT-5.6 Terra (Low) | Grok 4.6 (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 27.5 | 42.8 | +55.6% Grok 4.6 (Medium) is 55.6% more intelligent |
| Total AA cost (lower is better) | $350.36 | $1,557.04 | +344.4% Grok 4.6 (Medium) is 4.4× more expensive |
| End-to-end time (lower is better) | 5.92s | 34.77s | +487.3% Grok 4.6 (Medium) is 487.3% slower |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $2.00 / $6.00 | |
| Input modalities | Text, Image | Text, Image |
Grok 4.6 (Medium) vs GPT-5.6 Terra (Low): 55.6% more intelligence, 344.4% more cost to run the AA benchmark, and 487.3% slower end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-5.6 Terra (Low) is off the frontier: at the same or lower cost, MiMo-V2.6-Pro scores 46.30 for $207.
- Grok 4.6 (Medium) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-5.6 Terra (Low)Grok 4.6 (Medium)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-low/grok-4-6-medium · Markdown: /api/v1/compare/gpt-5-6-terra-low/grok-4-6-medium?format=md · llms.txt · agent skill