DeepSeek: DeepSeek V3.1 Terminus✓ Catalog verified
DeepSeek-V3.1 Terminus is an update to DeepSeek 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...
Overview
DeepSeek-V3.1 Terminus is an update to DeepSeek 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...
Access: available through the official DeepSeek API. Context window: 164K.
Specifications
| API identifier | deepseek/deepseek-v3.1-terminus |
| Provider | DeepSeek |
| Model type | Text LLM |
| Context window | 164K catalog |
| Input modalities | text |
| Output modalities | text |
| Released | Sep 22, 2025 |
| Tokenizer | DeepSeek |
| Instruction format | deepseek-v3.1 |
| Moderated | No |
| Architecture modality | text->text |
| Scheduled expiry | 2026-09-28 |
API defaults
{
"top_p": null,
"temperature": null,
"frequency_penalty": null
}Pricing
Live pricing components for deepseek/deepseek-v3.1-terminus as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $2.7e-7 | $0.27 / 1M | Per input token |
| Completion tokens | $0.000001 | $1.00 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.34Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | Not advertised | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | ✓ Supported | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call DeepSeek: DeepSeek V3.1 Terminus through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="deepseek/deepseek-v3.1-terminus",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Meta: Llama Guard 4 12B | Meta | 164K | $0.18 | View → |
| TNG: DeepSeek R1T2 Chimera | Tngtech | 164K | $0.30 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does DeepSeek: DeepSeek V3.1 Terminus cost?
$0.27 per 1M input tokens and $1.00 per 1M output tokens on the official DeepSeek API.
What is the context window of DeepSeek: DeepSeek V3.1 Terminus?
DeepSeek: DeepSeek V3.1 Terminus supports up to 164K tokens of context.
Does DeepSeek: DeepSeek V3.1 Terminus support tool / function calling?
Yes, DeepSeek: DeepSeek V3.1 Terminus supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access DeepSeek: DeepSeek V3.1 Terminus?
Use the official DeepSeek API with the model id `deepseek/deepseek-v3.1-terminus`. See the Quick start section above for code examples.