DeepSeek
DeepSeek V3.1 Terminus
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's
At a glance
- Input / 1M
- $0.27
- Output / 1M
- $1
- Context
- 164K
- Max output
- 147K
- Intelligence
- 14.8
- Released
- Sep 2025
Pricing
DeepSeek V3.1 Terminus API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $0.27 |
|---|---|
| Output tokensPer 1M tokens | $1 |
| Cached input (read)Per 1M tokens | Not available |
| Cache writePer 1M tokens | Not available |
Chat message
2K in, 500 out
$1.04
per 1,000 requests
Coding task
30K in, 4K out
$12.10
per 1,000 requests
Long document summary
150K in, 2K out
$42.50
per 1,000 requests
Benchmarks
DeepSeek V3.1 Terminus benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
14.8
Coding index
43.5
Agentic index
6.8
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 164K tokens
- Max output
- 147K tokens
- Input types
- Text
- Output types
- Text
- Reasoning effort
- Not available
- Release date
- September 22, 2025
- Knowledge cutoff
- March 31, 2025
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
DeepSeek V3.1 Terminus vs other models
See how DeepSeek V3.1 Terminus stacks up head to head on price, benchmarks, and features.
VSDeepSeek V3.1 Terminus vs DeepSeek V4 Flash 0423
DeepSeek vs DeepSeek
See comparisonVS
DeepSeek V3.1 Terminus vs Qwen3.6 35B A3B
DeepSeek vs Qwen
See comparisonVS
DeepSeek V3.1 Terminus vs Gemini 3.1 Flash Lite
DeepSeek vs Google
See comparisonVSDeepSeek V3.1 Terminus vs Gemini 2.5 Flash
DeepSeek vs Google
See comparisonVSDeepSeek V3.1 Terminus vs Gemma 4 31B
DeepSeek vs Google
See comparisonVSDeepSeek V3.1 Terminus vs DeepSeek V3.2 Exp
DeepSeek vs DeepSeek
See comparisonAlternatives
DeepSeek V3.1 Terminus alternatives
Similar models worth considering, and where each one has the edge.
DeepSeek
DeepSeek V4 Flash 0423
Qwen
Qwen3.6 35B A3B
DeepSeek
DeepSeek V3.2 Exp
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does DeepSeek V3.1 Terminus cost?
DeepSeek V3.1 Terminus costs $0.27 per 1M input tokens and $1 per 1M output tokens through the API. A typical chat message costs about $1.04 per 1,000 messages.
What is the context window of DeepSeek V3.1 Terminus?
DeepSeek V3.1 Terminus accepts up to 164K tokens of input and can write up to 147K tokens in a single response.
What is the best alternative to DeepSeek V3.1 Terminus?
DeepSeek V4 Flash 0423 from DeepSeek is a strong alternative. It offers: higher intelligence score, larger 1.05m context, newer release.
Can I use DeepSeek V3.1 Terminus alongside other models?
Yes. Shortcut Chat sends one prompt to DeepSeek V3.1 Terminus and any other models you pick at the same time, so you can compare answers side by side.
Try DeepSeek V3.1 Terminus next to every other model.
Use DeepSeek V3.1 Terminus alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.