DeepSeek V3.1 Terminus
Provider：DeepSeek
DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model…
Key specs
- Context：163.8K
- Max output：32.8K
- Tokenizer：DeepSeek
- Released：2025-09-22
Token pricing
- Input price：$0.270 / 1M tokens
- Output price：$1.00 / 1M tokens
- Cache read：$0.135 / 1M tokens
- Blended price：$0.453 / 1M tokens
Modalities
Text
Use Cases
- Deep Reasoning & Analysis：Math proofs, logical reasoning, multi-step planning — ideal for research and financial analysis.（≈ $0.0080/call）
- Chat & Support：FAQ auto-response, multi-turn dialogue, emotion detection — e-commerce, finance, gov.（≈ $0.0050/turn）
When to pick this model
Signals derived from public pricing and spec fields — not a benchmark. Validate with official docs and your own eval.
- Low input + output price: solid fit for high-frequency calls and batch processing.
- Long max output (>=30K tokens): strong fit for deep report / essay / document-drafting workflows.
FAQ
- What is the token pricing of DeepSeek V3.1 Terminus? Input price $0.270 / 1M tokens, output price $1.00 / 1M tokens, blended about $0.453 / 1M tokens. Refer to DeepSeek’s official page for the exact rate.
- What context window does DeepSeek V3.1 Terminus support? Context window is 163.8K, max output about 32.8K, suitable for long documents, multi-turn chat and complex reasoning.
- What scenarios is DeepSeek V3.1 Terminus best for? Based on its capability and pricing, DeepSeek V3.1 Terminus fits best: Deep Reasoning & Analysis, Chat & Support. See the Use Cases section for details and cost estimates.
- What input/output modalities does DeepSeek V3.1 Terminus support? Supports Text modality.
- Is DeepSeek V3.1 Terminus a free model? DeepSeek V3.1 Terminus is billed per token, not a free model.
- Which provider offers DeepSeek V3.1 Terminus? DeepSeek V3.1 Terminus is offered by DeepSeek.
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Full info：DeepSeek V3.1 Terminus