GPT-5.6 Terra (Xhigh) vs Mistral Small 4 (Reasoning)
Which is better for the money: GPT-5.6 Terra (Xhigh) by OpenAI or Mistral Small 4 (Reasoning) by Mistral? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Trade-off
Verdict
Depends on your budget
GPT-5.6 Terra (Xhigh) scores 26.7 points higher (38.0 vs 11.3) but costs 28× as much to run the benchmark ($1187 vs $42.5; premium vs budget cost classes). They are not alternatives at one budget: pick GPT-5.6 Terra (Xhigh) when you need intelligence above 11.3, and Mistral Small 4 (Reasoning) when 11.3 is enough.
| Metric | GPT-5.6 Terra (Xhigh) | Mistral Small 4 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 38.0 | 11.3 | −70.3% Mistral Small 4 (Reas… is 70.3% less intelligent |
| Total AA cost (lower is better) | $1,186.77 | $42.50 | −96.4% Mistral Small 4 (Reas… is 96.4% cheaper |
| End-to-end time (lower is better) | 14.99s | 14.50s | −3.3% Mistral Small 4 (Reas… is 3.3% faster |
| Price per 1M tokens (in / out) | $2.00 / $12.0 | $0.15 / $0.60 | |
| Input modalities | Text, Image | Text, Image |
Mistral Small 4 (Reasoning) vs GPT-5.6 Terra (Xhigh): 70.3% less intelligence, 96.4% less cost to run the AA benchmark, and 3.3% 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.
- Mistral Small 4 (Reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
GPT-5.6 Terra (Xhigh)Mistral Small 4 (Reasoning)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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