GPT-6 Astra (Xhigh) vs Mistral Small 3.1
Which is better for the money: GPT-6 Astra (Xhigh) by OpenAI or Mistral Small 3.1 by Mistral? 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
GPT-6 Astra (Xhigh) scores 45.3 points higher (52.4 vs 7.1) but costs 137× as much to run the benchmark ($3803 vs $27.8; flagship vs budget cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Xhigh) when you need intelligence above 7.1, and Mistral Small 3.1 when 7.1 is enough.
| Metric | GPT-6 Astra (Xhigh) | Mistral Small 3.1 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 52.4 | 7.1 | −86.5% Mistral Small 3.1 is 86.5% less intelligent |
| Total AA cost (lower is better) | $3,802.98 | $27.82 | −99.3% Mistral Small 3.1 is 99.3% cheaper |
| End-to-end time (lower is better) | 176.59s | 10.74s | −93.9% Mistral Small 3.1 is 93.9% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $0.08 / $0.14 | |
| Input modalities | Text, Image | Text, Image |
Mistral Small 3.1 vs GPT-6 Astra (Xhigh): 86.5% less intelligence, 99.3% less cost to run the AA benchmark, and 93.9% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Astra (Xhigh) is off the frontier: at the same or lower cost, Kimi K3.1 Pro scores 55.10 for $3117.
- Mistral Small 3.1 is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
GPT-6 Astra (Xhigh)Mistral Small 3.1Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-astra-xhigh/mistral-small-3-1 · Markdown: /api/v1/compare/gpt-6-astra-xhigh/mistral-small-3-1?format=md · llms.txt · agent skill