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Step-1o Turbo
Step-1o Turbo is a proprietary model from StepFun. It ranks #222 of 351 on the LMArena text leaderboard with a rating of 1336.
LMArena text1336
Rank#222/351
95% interval1329–1343
Votes8.9K
- Developer
- StepFun
- Released
- Oct 20, 2026
- Context window
- —
- Price in / out, per 1M tokens
- —
- Weights
- Proprietary
- Inputs
- —
- Reasoning
- —
- Tool use
- —
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1336 | 222 / 351 | 8.9K |
| CodingLMArena | 1339 | 233 / 346 | 1.5K |
| MathLMArena | 1318 | 227 / 339 | 563 |
| Creative writingLMArena | 1307 | 216 / 349 | 992 |
| Instruction followingLMArena | 1310 | 226 / 351 | 2.1K |
| Hard promptsLMArena | 1335 | 223 / 351 | 3.7K |
| Multi-turnLMArena | 1340 | 213 / 349 | 1.4K |
| Long queriesLMArena | 1348 | 202 / 330 | 1.3K |
| ExpertLMArena | 1308 | 230 / 305 | 484 |
| Legal and governmentIndustries | 1355 | 203 / 325 | 654 |
| Medicine and healthcareIndustries | 1349 | 212 / 325 | 599 |
| Business and financeIndustries | 1329 | 213 / 344 | 1.4K |
| ChineseLanguages | 1380 | 199 / 328 | 545 |
| GermanLanguages | 1314 | 190 / 261 | 345 |
| VisionLMArena | 1186 | 102 / 146 | 1.9K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare Step-1o Turbo
StepFun
Builds the Step family of large multimodal models. Founded 2023, based in Shanghai. stepfun.com
Questions
Who makes Step-1o Turbo?
Step-1o Turbo is made by StepFun, founded 2023 and based in Shanghai.
How does Step-1o Turbo rank?
#222 of 351 on LMArena’s text leaderboard, rated 1336 (95% interval 1329–1343) from 8,904 votes, as of Oct 22, 2026.
Is Step-1o Turbo open source?
No. Step-1o Turbo is proprietary and served through its provider’s API.