Model Overview
DeepSeek-V3.2-Exp Non-Thinking is an experimental transformer-based large language model launched in September 2025. Designed as an evolution of DeepSeek V3.1-Terminus, it introduces the DeepSeek Sparse Attention (DSA) mechanism to enable efficient and scalable long-context understanding, delivering faster and more cost-effective inference by selectively attending to essential tokens.
Technical Specifications
- Model Generation: Experimental intermediary development from DeepSeek V3.1
- Architecture Type: Transformer with fine-grained sparse attention (DeepSeek Sparse Attention - DSA)
- Parameter Alignment: Training aligned to V3.1-Terminus for benchmarking validity
- Context Length: Supports up to 128,000 tokens, suitable for multi-document and long-form text processing
- Max Output Tokens: 4,000 default, supports up to 8,000 tokens per response
Performance Benchmarks
Performance remains on par or better than V3.1-Terminus across multiple domains such as reasoning, coding, and real-world agentic tasks while delivering substantial efficiency gains.
- Scores 79.9 on GPQA-Diamond (Question Answering), slightly below V3.1 (80.7)
- Reaches 74.1 on LiveCodeBench (Coding), close to 74.9 of V3.1
- Scores 89.3 on AIME 2025 (Mathematics), surpassing V3.1 (88.4)
- Performs at 2121 on Codeforces programming benchmark, better than V3.1 (2046)
- Achieves 40.1 on BrowseComp (Agentic Tool Use), better than V3.1 (38.5)
Key Features
- DeepSeek Sparse Attention (DSA): Innovative fine-grained sparse attention mechanism focusing computation only on the most important tokens, dramatically reducing compute and memory requirements.
- Massive Context Support: Processes up to 128,000 tokens (over 300 pages of text), enabling long-form document understanding and multi-document workflows.
- Significant Cost Reduction: Inference cost reduced by more than 50% compared to DeepSeek V3.1-Terminus, making it highly efficient for large-scale usage.
- High Efficiency and Speed: Optimized for fast inference, offering 2-3x acceleration on long-text processing compared to prior versions without sacrificing output quality.
- Maintains Quality: Matches or exceeds DeepSeek V3.1-Terminus performance across multiple benchmarks with comparable generation quality.
- Scalable and Stable: Optimized for large-scale deployment with improved memory consumption and inference stability on extended context lengths.
- Non-Thinking Mode: Prioritizes direct, fast answers without generating intermediate reasoning steps, perfect for latency-sensitive applications.
API Pricing
- 1M input tokens (CACHE HIT): $0.0294
- 1M input tokens (CACHE MISS): $0.294
- 1M output tokens: $0.441
Use Cases
- Fast interactive chatbots and assistants where responsiveness is critical
- Long-form document summarization and extraction without explanation overhead
- Code generation/completion over large repositories where speed is key
- Multi-document search and retrieval with low latency
- Pipeline integrations requiring JSON outputs without intermediate reasoning noise
Code Sample
Comparison with Other Models
vs. DeepSeek V3.1-Terminus: V3.2-Exp introduces the DeepSeek Sparse Attention mechanism, significantly reducing compute costs for long contexts while maintaining nearly identical output quality. It achieves similar benchmark performance but is about 50% cheaper and notably faster on large inputs compared to V3.1-Terminus.
vs. GPT-5: While GPT-5 leads in raw language understanding and generation quality across a broad range of tasks, DeepSeek V3.2-Exp notably excels in handling extremely long contexts (up to 128K tokens) more cost-effectively. DeepSeek’s sparse attention provides a strong efficiency advantage for document-heavy and multi-turn applications.
vs. LLaMA 3: LLaMA models offer competitive performance with dense attention but typically cap context size at 32K tokens or less. DeepSeek's architecture targets long-context scalability with sparse attention, enabling smoother performance on very large documents and datasets where LLaMA may degrade or become inefficient.