GPT-6 Luna (Medium) vs Mistral Medium 3.5
Which is better for the money: GPT-6 Luna (Medium) by OpenAI or Mistral Medium 3.5 by Mistral? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-24.
Clear winner
Verdict
Pick GPT-6 Luna (Medium)
Mistral Medium 3.5 vs GPT-6 Luna (Medium): 52.5% less intelligence, 3954.5% more cost to run the AA benchmark, and 117.7% slower end-to-end.
| Metric | GPT-6 Luna (Medium) | Mistral Medium 3.5 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.9 | 14.2 | −52.5% Mistral Medium 3.5 is 52.5% less intelligent |
| Total AA cost (lower is better) | $31.17 | $1,263.80 | +3954.5% Mistral Medium 3.5 is 41× more expensive |
| End-to-end time (lower is better) | 8.25s | 17.96s | +117.7% Mistral Medium 3.5 is 117.7% slower |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $1.50 / $7.50 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-6 Luna (Medium) is on today's frontier: nothing is both smarter and cheaper.
- 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 Luna (Medium)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-luna-medium/mistral-medium-3-5 · Markdown: /api/v1/compare/gpt-6-luna-medium/mistral-medium-3-5?format=md · llms.txt · agent skill