DeepSeek-V3.1, released in August 2025, was one of the first production-ready hybrid inference models, combining thinking and non-thinking modes within a single 671-billion-parameter MoE. Both modes activate 37 billion parameters per token and support a 128K-token context, letting developers switch between multi-step reasoning and direct answers via the chat template. Thinking mode performs chain-of-thought reasoning at quality comparable to the earlier R1 model while reaching answers faster, and non-thinking mode delivers quick, tool-compatible responses with function calling support. Post-training notably strengthened agent and tool-use skills, with widely reported improvements in multi-step reasoning over its predecessor. Open weights are available on Hugging Face. V3.1 suits agentic systems that need to move dynamically between rapid inference and deeper reasoning depending on the task.
DeepSeek V3.1 runs on 3 different routes through the Opper gateway. Compare residency, ZDR, and training posture at a glance β full data-handling detail per route below.
Training posture across routes: No training on prompts by default.
Each route hosting DeepSeek V3.1 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; unknown.
Zero data retention is on by default on Pay-as-you-go β no action required. No training on customer data. US; dpf sccs; DPA available.
Zero data retention is available via Opper Enterprise contract. No training on customer data. US; SCCs; DPA available.
Independent benchmark scores β composite indices for reasoning, coding, and math, plus individual eval scores where available.
Call DeepSeek V3.1 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly β Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.
Copy this and paste it into your coding agent β Claude Code, Cursor, Codex, and more β and it'll wire up Opper for you.
import OpenAI from "openai";const client = new OpenAI({apiKey: process.env.OPPER_API_KEY,baseURL: "https://api.opper.ai/v3/compat",});const completion = await client.chat.completions.create({model: "deepinfra/deepseek-ai/DeepSeek-V3.1",messages: [{ role: "user", content: "Hello" }],});console.log(completion.choices[0].message.content);
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