DeepSeek: DeepSeek V3.1 Terminus
DeepSeek V3.1 Terminus is designed for handling text inputs with an extensive context length of 163,840 tokens and supports both reasoning and tools integration. This model can process large volumes of data and offers robust support for generating structured output, making it a versatile choice for complex tasks. Given its benchmark score of 34.9 across 1 independent test, DeepSeek V3.1 Terminus is suitable for users who need a powerful yet not overly expensive solution. With pricing at $0.27 per million input tokens and $0.95 per million output tokens, it strikes a balance between cost and performance, making it a strong contender for those looking to leverage AI in their projects without breaking the bank.
Benchmark results
Independent, published benchmarks. Blended score 34.9 across 1 benchmark, last refreshed 2026-08-13. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 35.9 |
- Model ID
- deepseek/deepseek-v3.1-terminus
- Vendor
- deepseek
- Released
- September 2025
- Tokenizer
- DeepSeek
- Input Modalities
- text
- Output Modalities
- text
- Max Output
- 32,768 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- text only
- Audio
- no
- Moderated
- no
What it costs in practice
Computed from the current $0.27/M input and $0.95/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | under $0.01 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.18 |
| A month of a busy support chatbot | 5M in / 2M out | $3.25 |
Price & spec history
Tracked daily by PicksByModel since 2026-07-17.
| Date | Input /M | Output /M | Context |
|---|---|---|---|
| 2026-08-12 | $0.27 | $0.95 | 163,840 |
| 2026-07-22 | $0.27 | $1.00 | 163,840 |
| 2026-07-17 | $0.27 | $1.00 | 131,072 |
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Quick answers
- How much does DeepSeek: DeepSeek V3.1 Terminus cost?
- $0.27 per million input tokens and $0.95 per million output tokens.
- What is DeepSeek: DeepSeek V3.1 Terminus's context window?
- 163,840 tokens, roughly 245 pages of text in a single request.
- Does DeepSeek: DeepSeek V3.1 Terminus support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can DeepSeek: DeepSeek V3.1 Terminus process images?
- No, it is text-only on the input side.