On 22 Sep 2025 DeepSeek published DeepSeek-V3.1-Terminus on Hugging Face and updated its API. The release is licensed under MIT.
| Attribute | Value | Source |
|---|---|---|
| Total parameters | 671 B (37 B active per token) | GitHub README, 22 Sep 2025 |
| Context length | 128 000 tokens | GitHub README, 22 Sep 2025 |
| Precision | FP8 mixed precision | GitHub README, 22 Sep 2025 |
The evaluation sheet shows the following scores:
| Benchmark | V3.1 | V3.1-Terminus |
|---|---|---|
| BrowseComp | 30.0 | 38.5 |
| SWE Verified | 66.0 | 68.4 |
| Terminal-bench | 31.3 | 36.7 |
“Acts as a ‘service pack’ refinement rather than a ground-up redesign.”
— DeepSeek README, 22 Sep 2025
API price is quoted at $0.96 per 1 M tokens.
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