# DeepSeek — DeepSeek-V3.1 is now DeepSeek-V3.1-Terminus

- Company: DeepSeek (deepseek.com)
- Announced: 2025-09-22T00:00:00+00:00
- Category: model-update
- Subject: DeepSeek models
- Open weights: yes
- Models affected: DeepSeek-V3.1-Terminus
- Source: https://www.deepseek.com/en/news/v3-1-terminus
- Record: https://forck.live/items/4322-deepseek-v3-1-is-now-deepseek-v3-1-terminus

DeepSeek updated its V3.1 model to V3.1-Terminus, improving language consistency, agent performance, and output stability.

## Evidence

Verbatim from https://www.deepseek.com/en/news/v3-1-terminus:

> The latest update builds on V3.1's strengths while addressing key user feedback. ... DeepSeek-V3.1-Terminus delivers more stable & reliable outputs across benchmarks compared to the previous version.

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