GPT-6 Astra (Xhigh) vs Mistral Medium 3.5
Which is better for the money: GPT-6 Astra (Xhigh) by OpenAI or Mistral Medium 3.5 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 38.2 points higher (52.4 vs 14.2) but costs 3.0× as much to run the benchmark ($3803 vs $1264; flagship vs premium cost classes). They are not alternatives at one budget: pick GPT-6 Astra (Xhigh) when you need intelligence above 14.2, and Mistral Medium 3.5 when 14.2 is enough.
| Metric | GPT-6 Astra (Xhigh) | Mistral Medium 3.5 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 52.4 | 14.2 | −72.9% Mistral Medium 3.5 is 72.9% less intelligent |
| Total AA cost (lower is better) | $3,802.98 | $1,263.80 | −66.8% Mistral Medium 3.5 is 66.8% cheaper |
| End-to-end time (lower is better) | 176.59s | 17.68s | −90.0% Mistral Medium 3.5 is 90.0% faster |
| Price per 1M tokens (in / out) | $10.0 / $50.0 | $1.50 / $7.50 | |
| Input modalities | Text, Image | Text, Image |
Mistral Medium 3.5 vs GPT-6 Astra (Xhigh): 72.9% less intelligence, 66.8% less cost to run the AA benchmark, and 90.0% 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 Medium 3.5 is off the frontier: at the same or lower cost, GPT-6.1 Sol (Max) scores 51.80 for $1082.
GPT-6 Astra (Xhigh)Mistral Medium 3.5Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-6-astra-xhigh/mistral-medium-3-5 · Markdown: /api/v1/compare/gpt-6-astra-xhigh/mistral-medium-3-5?format=md · llms.txt · agent skill