gpt-oss-120b
gpt-oss-120b is a solid mid-pack model: #171 of 406 by SIscope score. Even across the board, with no weak spot in what's been tested. Cheaper than 99% of priced models. 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.
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 | #195 of 419 | 1366 | 1361–1370 | 30,200 | Oct 28, 2026 |
| WebDev arena Building web apps, blind human votes | Not on this board yet | ||||
| Vision arena Questions about images, blind human votes | Not on this board yet | ||||
| Agent arena Real multi-step agent sessions | Not on this board yet | ||||
Source: Arena (formerly LMArena) leaderboard dataset, CC BY 4.0. Fetched Nov 4, 2026.
Price
List price from the OpenRouter models API (openai/gpt-oss-120b), Nov 4, 2026. Providers can charge differently.