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Step-2 16K Exp
Step-2 16K Exp is a proprietary model from StepFun. It ranks #233 of 351 on the LMArena text leaderboard with a rating of 1321.
LMArena text1321
Rank#233/351
95% interval1312–1329
Votes4.8K
- 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 | 1321 | 233 / 351 | 4.8K |
| CodingLMArena | 1316 | 246 / 346 | 737 |
| MathLMArena | 1305 | 238 / 339 | 642 |
| Creative writingLMArena | 1327 | 196 / 349 | 751 |
| Instruction followingLMArena | 1287 | 245 / 351 | 2K |
| Hard promptsLMArena | 1299 | 249 / 351 | 1.2K |
| Multi-turnLMArena | 1292 | 252 / 349 | 805 |
| Long queriesLMArena | 1306 | 244 / 330 | 693 |
| ExpertLMArena | 1279 | 241 / 305 | 310 |
| Legal and governmentIndustries | 1337 | 225 / 325 | 278 |
| Medicine and healthcareIndustries | 1355 | 207 / 325 | 265 |
| Business and financeIndustries | 1283 | 251 / 344 | 506 |
| ChineseLanguages | 1331 | 232 / 328 | 328 |
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-2 16K Exp
StepFun
Builds the Step family of large multimodal models. Founded 2023, based in Shanghai. stepfun.com
Questions
Who makes Step-2 16K Exp?
Step-2 16K Exp is made by StepFun, founded 2023 and based in Shanghai.
How does Step-2 16K Exp rank?
#233 of 351 on LMArena’s text leaderboard, rated 1321 (95% interval 1312–1329) from 4,833 votes, as of Oct 22, 2026.
Is Step-2 16K Exp open source?
No. Step-2 16K Exp is proprietary and served through its provider’s API.