Mistral Medium 3.5
Mistral Medium 3.5 is a solid mid-pack model: #179 of 406 by SIscope score. Strongest at following instructions, weaker at agents & tools. Mid-range on price. Weights are open, so you can run it yourself.
Shape
Each spoke is a category, 0 at the centre, 100 at the edge.
Category scores
Percentiles: 90 means better than about 90% of tested models.
Human-vote score over time
Text arena, recent updates.
Coding votes over time
WebDev arena, recent updates.
Independent test runs
Run by Epoch AI on the same harness for every model. Bars show the share of questions answered correctly.
Human-vote arenas
People compare two anonymous answers and pick the better one. Scores work like chess ratings.
| Arena | Rank | Score | Range (95%) | Votes | Updated |
|---|---|---|---|---|---|
| Text arena Everyday chat, blind human votes | #114 of 419 | 1421 | 1414–1427 | 11,791 | Oct 28, 2026 |
| WebDev arena Building web apps, blind human votes | #136 of 152 | 1264 | 1249–1279 | 2,299 | Oct 28, 2026 |
| Vision arena Questions about images, blind human votes | #83 of 167 | 1223 | 1213–1232 | 5,375 | Oct 19, 2026 |
| Agent arena Real multi-step agent sessions | #52 of 57 | -13.2% | -14.9–-11.5% | 14,001 | Nov 2, 2026 |
Source: Arena (formerly LMArena) leaderboard dataset, CC BY 4.0. Fetched Nov 4, 2026.
Price
List price from the OpenRouter models API (mistralai/mistral-medium-3-5), Nov 4, 2026. Providers can charge differently.