DeepSeek-V3.1-Terminus Released with Major Upgrades
DeepSeek-V3.1-Terminus Launches with Enhanced Capabilities
September 23, 2025 - AI research company DeepSeek has officially released DeepSeek-V3.1-Terminus, a significant upgrade to its flagship language model now available through its API platform and subsequently open-sourced.
Performance Improvements
The new version demonstrates measurable gains across multiple benchmarks:
- 0.2% to 36.5% improvement in non-Agent tests
- Most notable gains in HLE (Human Ultimate Test) evaluating expert-level knowledge
- Enhanced performance in multimodal content processing and deep reasoning
Technical Refinements
The update addresses several issues reported in the previous V3.1 release:
- Fixed language inconsistency problems
- Resolved occasional abnormal character generation
- Optimized programming and search agent functionality
In Agent-specific evaluations, the model shows incremental improvements in:
- Web browsing capabilities
- Simple Q&A responses
- Multiple programming test scenarios
Availability
The updated model is now live across all DeepSeek platforms:
- Official DeepSeek mobile application
- Web interface version
- Mini program implementations
- API endpoints for developers
The company has made the model available through these open-source repositories:
Key Points:
- Performance gains range from marginal to substantial (0.2%-36.5%)
- Specialized improvements in expert-level knowledge evaluation (HLE test)
- Fixes address language consistency and character generation issues
- Now available across all DeepSeek platforms as open-source