GPT-6 Astra (High) vs Mistral Medium 3.5
Which is better for the money: GPT-6 Astra (High) 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 (High) scores 36.7 points higher (50.9 vs 14.2) but costs 2.3× as much to run the benchmark ($2925 vs $1264; flagship vs premium cost classes). Pick GPT-6 Astra (High) when the extra intelligence is worth the premium, otherwise Mistral Medium 3.5.
| Metric | GPT-6 Astra (High) | Mistral Medium 3.5 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 50.9 | 14.2 | −72.1% Mistral Medium 3.5 is 72.1% less intelligent |
| Total AA cost (lower is better) | $2,925.01 | $1,263.80 | −56.8% Mistral Medium 3.5 is 56.8% cheaper |
| End-to-end time (lower is better) | 49.57s | 17.98s | −63.7% Mistral Medium 3.5 is 63.7% 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 (High): 72.1% less intelligence, 56.8% less cost to run the AA benchmark, and 63.7% faster end-to-end.
Today's Pareto frontier
Against the frontier
- GPT-6 Astra (High) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- 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 (High)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-high/mistral-medium-3-5 · Markdown: /api/v1/compare/gpt-6-astra-high/mistral-medium-3-5?format=md · llms.txt · agent skill