GPT-5.6 Luna (Low) vs Mistral Small 3.1
Which is better for the money: GPT-5.6 Luna (Low) by OpenAI or Mistral Small 3.1 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 Small 3.1 vs GPT-5.6 Luna (Low): 66.2% less intelligence, 3.0% more cost to run the AA benchmark, and 87.2% slower end-to-end.
| Metric | GPT-5.6 Luna (Low) | Mistral Small 3.1 | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 21.0 | 7.1 | −66.2% Mistral Small 3.1 is 66.2% less intelligent |
| Total AA cost (lower is better) | $27.02 | $27.82 | +3.0% Mistral Small 3.1 is 3.0% more expensive |
| End-to-end time (lower is better) | 5.78s | 10.82s | +87.2% Mistral Small 3.1 is 87.2% slower |
| Price per 1M tokens (in / out) | $0.20 / $1.20 | $0.08 / $0.14 | |
| 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 Small 3.1 is off the frontier: at the same or lower cost, GPT-6 Luna (Low) scores 21.50 for $10.6.
GPT-5.6 Luna (Low)Mistral Small 3.1Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
Compare something else
Agents:
Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/gpt-5-6-luna-low/mistral-small-3-1 · Markdown: /api/v1/compare/gpt-5-6-luna-low/mistral-small-3-1?format=md · llms.txt · agent skill