DeepSeek: DeepSeek V3.1 Terminus: AI model
DeepSeek V3.1 Terminus is the update to DeepSeek V3.1 that improves language consistency and agent capabilities. A 671B hybrid-reasoning model with thinking and non-thinking modes, via Hormouz.
- Context window:
- 163,840 tokens
- Input:
- $0.27/1M tokens
- Output:
- $1/1M tokens
- Type:
- text
- Tools
- Streaming
- Long context
Thinking levels:
DeepSeek V3.1 Terminus is an update to DeepSeek V3.1 that keeps the model’s core capabilities while addressing user-reported issues. Including language consistency and agent behaviour. And further improves performance in coding and search agents.
It is a large hybrid-reasoning model with 671 billion parameters (37 billion active) that supports both thinking and non-thinking modes, with a context window reaching up to about 160K tokens. It supports tool calling and structured output and suits research, coding and agentic workflows.
Pricing is usage-based: $0.34/M in · $1.03/M out. Hormouz provides stable access to the model from inside Iran, with no foreign credit card or circumvention tooling required.
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...
Quickstart
curl https://api.hormouz.net/v1/chat/completions \
-H "Authorization: Bearer ng-YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek/deepseek-v3.1-terminus",
"messages": [{"role": "user", "content": "Hello!"}]
}'Specs
| Vendor | DeepSeek |
|---|---|
| Type | Text |
| Context window | 163,840 tokens |
| Pricing | $0.27/M in · $1.00/M out |
| API | Chat Completions |
| Capabilities | Streaming · Tools |
Benchmarks
Reasoning
Coding
Agentic
Source: Artificial Analysis
Design Arena
How Design Arena works ↗Metrics sourced from Design Arena
Code example
curl https://api.hormouz.net/v1/chat/completions \
-H "Authorization: Bearer ng-YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek/deepseek-v3.1-terminus",
"messages": [{"role": "user", "content": "Hello!"}]
}'from openai import OpenAI
client = OpenAI(api_key="ng-YOUR_API_KEY", base_url="https://api.hormouz.net/v1")
response = client.chat.completions.create(
model="deepseek/deepseek-v3.1-terminus",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({ apiKey: "ng-YOUR_API_KEY", baseURL: "https://api.hormouz.net/v1" });
const response = await client.chat.completions.create({
model: "deepseek/deepseek-v3.1-terminus",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);Buy the DeepSeek: DeepSeek V3.1 Terminus API, paid in rial
- Buy credit with an Iranian bank card; no foreign card or account needed.
- One Hormouz key reaches DeepSeek: DeepSeek V3.1 Terminus and 600+ other models, and you pay only for what you use.
- No VPN and no risk of a banned account; just change the base URL to api.hormouz.net/v1.
Use via Hormouz
Connect to this model and 600+ others with one API key, then see usage down to each request.
Request company accessFAQ
- How much does this model cost?
- Billing is usage-based: $0.34 per million input tokens and $1.03 per million output tokens. There is no fixed monthly fee. You pay only for what you use.
- How is DeepSeek V3.1 Terminus different from DeepSeek V3.1?
- Terminus is an update to V3.1 that improves language consistency and agent behaviour and strengthens performance in coding and search agents, while keeping the model’s core capabilities.
- Does DeepSeek V3.1 Terminus support a thinking mode?
- Yes. Like V3.1, it supports both thinking and non-thinking modes, which you control with the reasoning parameter.
- How do I access this model from inside Iran?
- Create an account on Hormouz and generate an API key. Hormouz provides a stable path to the model from inside Iran, with no foreign credit card required.
- Is this model compatible with OpenAI code?
- Yes. Hormouz exposes an OpenAI-compatible API. Just change the base URL to Hormouz and swap in your Hormouz key, and your existing SDKs run without a rewrite.
Updated 2026-10-13