DeepSeek V3.1 Terminus
Released by DeepSeek in 2025, DeepSeek V3.1 Terminus is an chat model. 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...
by DeepSeek · 164K token context window
Best for
- low-latency chat and routing
- request routing and triage
- text classification
Ways to use DeepSeek V3.1 Terminus in osFoundry
Connect with your own key (BYOK)
Open the key dialog and paste your DeepSeek API key. osFoundry discovers DeepSeek V3.1 Terminus automatically — assign it to a Maestro role (router, direct, orchestrator, or fallback) in the Pipeline tab and it is live in every chat. Your key, your provider account — no token markup.
Use it in a Room App
Room Apps declare AI features in their manifest, then call them with invokeAI:
import { invokeAI } from '@osfoundry/app-sdk'
// 'summarize' is an AI feature declared in your app manifest.
const result = await invokeAI('summarize', userText)
Call it from your own apps
Once a model is wired into your workspace you can host it as an API and reach it from your own services, scripts, or CI — outside osFoundry.
Run DeepSeek V3.1 Terminus yourself
DeepSeek V3.1 Terminus is also available as open weights — self-host it for full data control and no per-token cost. See that page for GPU requirements and a cost comparison against API pricing.
DeepSeek V3.1 Terminus vs similar models
Licence
Hosted — usage subject to provider terms — Hosted-only model — usage governed by the provider's API terms. Bring your own provider key.
No weights distributed; usage subject to provider terms.
Frequently asked about DeepSeek V3.1 Terminus
How much does DeepSeek V3.1 Terminus cost?
DeepSeek V3.1 Terminus is metered at $ 0.270 /1M for input, and $ 0.950 /1M for output. Bring your own DeepSeek API key — osFoundry passes through provider pricing without markup.
Can I use DeepSeek V3.1 Terminus commercially?
Commercial use is allowed with conditions. Hosted-only model — usage governed by the provider's API terms. Bring your own provider key. No weights distributed; usage subject to provider terms.
What is the context window of DeepSeek V3.1 Terminus?
DeepSeek V3.1 Terminus supports a 164K token context window.
Can I run DeepSeek V3.1 Terminus locally?
No — DeepSeek V3.1 Terminus is hosted only and accessed via the DeepSeek API. An open-weights equivalent is available to self-host — see the cross-link above.
What is DeepSeek V3.1 Terminus best at?
DeepSeek V3.1 Terminus is well-suited to low-latency chat and routing, request routing and triage, text classification.
How do I use DeepSeek V3.1 Terminus in osFoundry?
Paste your DeepSeek API key in the key dialog (or deploy the open weights for self-hostable models), assign DeepSeek V3.1 Terminus to a Maestro role in the Pipeline tab, then use it in chat, Room Apps via invokeAI, or your own apps.
Published by DeepSeek on September 22, 2025. Source: https://openrouter.ai/deepseek/deepseek-v3.1-terminus