GPT-6 Luna (Medium) vs Mistral Small 4 (Reasoning)
Which is better for the money: GPT-6 Luna (Medium) 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.
Clear winner
Verdict
Pick GPT-6 Luna (Medium)
Mistral Small 4 (Reasoning) vs GPT-6 Luna (Medium): 62.2% less intelligence, 36.3% more cost to run the AA benchmark, and 75.8% slower end-to-end.
| Metric | GPT-6 Luna (Medium) | Mistral Small 4 (Reasoning) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 29.9 | 11.3 | −62.2% Mistral Small 4 (Reas… is 62.2% less intelligent |
| Total AA cost (lower is better) | $31.17 | $42.50 | +36.3% Mistral Small 4 (Reas… is 36.3% more expensive |
| End-to-end time (lower is better) | 8.25s | 14.50s | +75.8% Mistral Small 4 (Reas… is 75.8% slower |
| Price per 1M tokens (in / out) | $0.10 / $0.50 | $0.15 / $0.60 | |
| 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 Small 4 (Reasoning) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
GPT-6 Luna (Medium)Mistral Small 4 (Reasoning)Today'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-small-4 · Markdown: /api/v1/compare/gpt-6-luna-medium/mistral-small-4?format=md · llms.txt · agent skill