DeepSeek V3.1 Terminus
$0.27 per 1M input tokens and $1.00 per 1M output tokens · 164K context · tools, reasoning, JSON, open weights.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What DeepSeek V3.1 Terminus costs per month
Estimated monthly bill for typical workloads. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $181 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $31.80 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $121 |
| Content generation 30 long articles a day | $2.98 |
| Classification / extraction 100,000 short items a day | $288 |
Price history
We started tracking DeepSeek V3.1 Terminus on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Where to run DeepSeek V3.1 Terminus: 2 providers
SiliconFlow is the cheapest at $0.27 input / $1.00 output per 1M tokens. Uptime is the average over the last 30 days as reported by OpenRouter; see provider reliability.
| Provider | Input / 1M | Output / 1M | Context | Uptime | Notes |
|---|---|---|---|---|---|
| SiliconFlow | $0.27 | $1.00 | 164K | 99.7% | fp8 |
| StreamLake | $0.343 | $1.03 | 128K | 99.8% | — |
Cheaper alternatives to DeepSeek V3.1 Terminus
Models with the same tool calling, structured output for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | visiontoolsreasoningJSON |
| GLM 5.3 Flash Z.ai | $0.041 | $0.12 | 1.05M | visiontoolsreasoningJSONopen weights |
| Ling 3.1 Flash inclusionAI | $0.075 | $0.225 | 262K | toolsreasoningJSON |
| GPT-6 Luna OpenAI | $0.10 | $0.50 | 1.05M | visiontoolsreasoningJSON |
| MiMo-V2.6-Flash Xiaomi | $0.14 | $0.28 | 1.05M | visionaudiotoolsreasoningJSONopen weights |
How to pay less for DeepSeek V3.1 Terminus
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $181 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Claude Haiku 5.5 (similar capabilities) | $58.56 | $123 (68%) |
Other workloads: cut-your-bill tool for DeepSeek V3.1 Terminus.
Specifications
| Model ID | deepseek/deepseek-v3.1-terminus |
| Input | text |
| Output | text |
| Tool calling | Yes |
| Structured output | Yes |
| Reasoning mode | Yes |
| Open weights | Yes — deepseek-ai/DeepSeek-V3.1-Terminus |
| Knowledge cutoff | 2025-03-31 |
| Released | Sep 22, 2025 |
FAQ
- How much does DeepSeek V3.1 Terminus cost?
- $0.27 per million input tokens and $1.00 per million output tokens. Prices as of Oct 21, 2026.
- What is the context window of DeepSeek V3.1 Terminus?
- 164K tokens, with up to 147K output tokens per response.
- Does DeepSeek V3.1 Terminus support images, tools and structured output?
- Images as input: no. Tool calling: yes. Structured (JSON) output: yes. Reasoning mode: yes.
- What are cheaper alternatives to DeepSeek V3.1 Terminus?
- Models with the same key capabilities for at least 20% less include Claude Haiku 5.5 ($0.10 / $0.50), GLM 5.3 Flash ($0.041 / $0.12), Ling 3.1 Flash ($0.075 / $0.225).
More from DeepSeek: all DeepSeek models · how we collect prices