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DeepSeek-V3.1
DeepSeek-V3.1 is an open-weight model from DeepSeek, released Aug 21, 2025. It ranks #117 of 351 on the LMArena text leaderboard with a rating of 1420. It costs $0.25 per million input tokens and $0.95 per million output tokens, with a 160K-token context window.
- Developer
- DeepSeek
- Released
- Aug 21, 2025
- Context window
- 160K
- Price in / out, per 1M tokens
- $0.25 / $0.95
- Weights
- Open · MIT
- Inputs
- Text
- Reasoning
- Yes
- Tool use
- Yes
- Hugging Face downloads, 30 days
- 316.1K
- Hugging Face likes
- 863
The rating LMArena published at each update since Aug 27, 2025. Ratings move as votes come in and new models join.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1420 | 117 / 351 | 14.6K |
| CodingLMArena | 1417 | 153 / 346 | 1.9K |
| MathLMArena | 1419 | 124 / 339 | 980 |
| Creative writingLMArena | 1401 | 101 / 349 | 1.6K |
| Instruction followingLMArena | 1401 | 128 / 351 | 2.8K |
| Hard promptsLMArena | 1417 | 138 / 351 | 5.1K |
| Multi-turnLMArena | 1408 | 143 / 349 | 1.8K |
| Long queriesLMArena | 1422 | 110 / 330 | 2.4K |
| ExpertLMArena | 1405 | 150 / 305 | 538 |
| Legal and governmentIndustries | 1417 | 137 / 325 | 770 |
| Medicine and healthcareIndustries | 1444 | 89 / 325 | 688 |
| Business and financeIndustries | 1409 | 127 / 344 | 1.9K |
| ChineseLanguages | 1469 | 89 / 328 | 1.1K |
| SpanishLanguages | 1431 | 100 / 249 | 411 |
| GermanLanguages | 1411 | 111 / 261 | 397 |
| FrenchLanguages | 1448 | 92 / 252 | 288 |
| JapaneseLanguages | 1379 | 101 / 236 | 334 |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown (DeepSeek-V3.1, DeepSeek-V3.1 (Thinking)).
Compare DeepSeek-V3.1
DeepSeek
A research lab known for strong open-weight reasoning and coding models trained at low cost. Founded 2023, based in Hangzhou. deepseek.com
Questions
Who makes DeepSeek-V3.1?
DeepSeek-V3.1 is made by DeepSeek, founded 2023 and based in Hangzhou.
How much does DeepSeek-V3.1 cost?
$0.25 per million input tokens and $0.95 per million output tokens, at its provider’s list price.
What is DeepSeek-V3.1’s context window?
160K tokens (163,840).
How does DeepSeek-V3.1 rank?
#117 of 351 on LMArena’s text leaderboard, rated 1420 (95% interval 1414–1426) from 14,607 votes, as of Oct 22, 2026.
Is DeepSeek-V3.1 open source?
DeepSeek-V3.1 has open weights under the MIT license, downloadable from Hugging Face (deepseek-ai/DeepSeek-V3.1).