GPT-5.6 Luna (Low) vs Mistral Medium 3.5
Which is better for the money: GPT-5.6 Luna (Low) 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.
Clear winner
Verdict
Pick GPT-5.6 Luna (Low)
Mistral Medium 3.5 vs GPT-5.6 Luna (Low): 32.4% less intelligence, 4577.3% more cost to run the AA benchmark, and 202.7% slower end-to-end.
| Metric | GPT-5.6 Luna (Low) | Mistral Medium 3.5 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 21.0 | 14.2 | −32.4% Mistral Medium 3.5 is 32.4% less intelligent |
| Total AA cost (lower is better) | $27.02 | $1,263.80 | +4577.3% Mistral Medium 3.5 is 47× more expensive |
| End-to-end time (lower is better) | 5.84s | 17.68s | +202.7% Mistral Medium 3.5 is 202.7% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $1.50 / $7.50 | |
| Input modalities | Text, Image | Text, Image |
Today's Pareto frontier
Against the frontier
- GPT-5.6 Luna (Low) is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
- 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-5.6 Luna (Low)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-5-6-luna-low/mistral-medium-3-5 · Markdown: /api/v1/compare/gpt-5-6-luna-low/mistral-medium-3-5?format=md · llms.txt · agent skill