33K context · 671B params · DeepSeek License
deepseek/deepseek-chat-v3-1
DeepSeek-V3.1 is a large hybrid reasoning model (671B parameters, 37B active) that supports both thinking and non-thinking modes via prompt templates. It extends the DeepSeek-V3 base with a two-phase long-context...
Reachability & verification
Live reachability
Target (DeepSeek): https://api.deepseek.com/v1
Live reachability probe
Measured in real time from the ModelHub gateway egress to this model's API endpoint. Green means reachable right now. Overseas reference latencies are estimates; the live probe is the proof of current reachability.
Pricing across providers
1Prices are shown in each provider's billing currency — ¥ (CNY) for Chinese providers, $ (USD) for overseas gateways.
| Provider | Input /1M | Output /1M | Blended | Ctx | p50 latency | API | Verified |
|---|---|---|---|---|---|---|---|
| DeepSeekdeepseek-chat-v3.1 | ¥0.15 | ¥0.75 | ¥0.3 | 33K | — | OAI | 119d ago |
Works with
Any OpenAI-compatible client works — point the base URL at the provider endpoint.
Capabilities
Languages: en, zh
Code samples
from openai import OpenAI
client = OpenAI(
base_url="https://api.deepseek.com/v1",
api_key="YOUR_API_KEY",
)
resp = client.chat.completions.create(
model="deepseek-chat-v3.1",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)curl https://api.deepseek.com/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "deepseek-chat-v3.1",
"messages": [{"role": "user", "content": "Hello!"}]
}'import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.deepseek.com/v1",
apiKey: "YOUR_API_KEY",
});
const resp = await client.chat.completions.create({
model: "deepseek-chat-v3.1",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(resp.choices[0].message.content);Technical specs
Context
33K
Max output
7K
Parameters
671B
Release
—
Training cutoff
—
License
DeepSeek License
Similar models
Frequently asked questions
How much does DeepSeek V3.1 cost?
The cheapest tracked blended price is ¥0.3 per 1M tokens on DeepSeek. See the pricing matrix above for input/output splits per provider.
Can I use DeepSeek V3.1 from outside China?
Availability depends on the hosting provider. Use our Path Planner on the DeepSeek page to map a verified official-vs-brokered access path, including payment and KYC constraints.
Is DeepSeek V3.1 open source?
Yes — DeepSeek V3.1 is open-weight under the DeepSeek License license. You can self-host it or use any listed inference provider.
Is DeepSeek V3.1 OpenAI-compatible?
Yes — at least one tracked provider exposes an OpenAI-compatible endpoint, so Cursor, Cline, Aider and similar clients work with just a base-URL change.
What is the maximum context window?
DeepSeek V3.1 supports up to 33K tokens of context with a maximum output of 7K tokens.
Need verified access to DeepSeek V3.1?
We broker vetted intros to DeepSeek — payment, KYC and endpoint verification handled.